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Golden State and the Mathematical Magic of Seventy-Three (newyorker.com)

Charles Bethea has written a fascinating piece on the number '73' for The New Yorker. Below are some tidbits from the story but I urge you to hit the New Yorker link and read the story in entirety there. Bethea writes: "I am aware of the Warriors's push for seventy-three wins," Ken Ono, a professor of mathematics at Emory University and the author of "The Web of Modularity: Arithmetic of the Coefficients of Modular Forms and q-series," said recently. [...] Professor Ono worked as a math consultant on a film called "The Man Who Knew Infinity," which stars Dev Patel and Jeremy Irons, and which screens this week at the Tribeca Film Festival, in New York. The movie centers on the friendship of the legendary Indian mathematician Srinivasa Ramanujan (Patel) and his Cambridge University colleague G. H. Hardy (Irons), and it depicts a famous story that Hardy once told about Ramanujan. "I remember once going to see him when he was ill at Putney," Hardy said. "I had ridden in taxicab number 1729 and remarked that the number seemed to me rather a dull one, and that I hoped it was not an unfavorable omen. "No," he replied. "It is a very interesting number; it is the smallest number expressible as the sum of two cubes in two different ways." One cubed plus twelve cubed, and nine cubed plus ten cubed. This was the first of what came to be known as "taxicab numbers." [...] So what does Professor Ono think of seventy-three? "I really like the number seventy-three," he said. "It is the sixth 'emirp.'" An emirp, he explained, is a prime number that remains prime when its digits are reversed. (Emirp, of course, is 'prime' spelled backward.)

102 comments

  1. Editing... by BronsCon · · Score: 1

    I saw this on the front page while it was still littered with broken Unicode. Thanks for actually doing some editing, but you guys missed one: oetaxicab.

    --
    APK quotes people (including myself) without context and should not be trusted. Just thought you should know.
    1. Re:Editing... by msmash · · Score: 2

      Hey, yeah just fixed all the glitches. Was planning to run this story later, but there was an issue with the timestamp.

    2. Re:Editing... by BronsCon · · Score: 1

      Yeah, I see the result of your continued editing now, but it looks like you missed one more; the last instance of "prime" has an opening single-quote with no closure.

      I'm not trying to give you a hard time here; I've actually never bothered pointing these errors out before because the previous editors didn't seem to care. You do, so I figure it's helpful.

      --
      APK quotes people (including myself) without context and should not be trusted. Just thought you should know.
    3. Re:Editing... by whipslash · · Score: 3, Interesting

      Fixed

    4. Re:Editing... by BronsCon · · Score: 5, Insightful

      So good to see Slashdot back in the hands of someone who gives a damn.

      --
      APK quotes people (including myself) without context and should not be trusted. Just thought you should know.
    5. Re:Editing... by Hylandr · · Score: 0, Troll

      Gives a damn is good. Deliberately pointing traffic for a story on *sports* while masking it as tech by trying to bring math into the equation... Not so much. An improvement in the attempt for certain but still a paid for traffic generator.

      Site owners used to cringe at the threat of being slash-dotted.

      --
      ~ People that think they are better than anyone else for any reason are the cause of all the strife in the world.
    6. Re:Editing... by Hognoxious · · Score: 1

      Fixed

      Not here: https://hardware.slashdot.org/...

      (second sentence)

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    7. Re:Editing... by whipslash · · Score: 1

      Thanks. Fixed as well.

    8. Re:Editing... by Rakarra · · Score: 1

      Gives a damn is good. Deliberately pointing traffic for a story on *sports* while masking it as tech by trying to bring math into the equation...

      Are you saying Math and Sports do not intersect? Sabremetricians would respectfully disagree!

      That said, I thought it was kindof a dumb story about the number 73. I quickly scanned through it to see if there was more to it than the summary that summarized the first two paragraphs of the story, but really, that was about it. It actually had almost nothing to do with sports and was more "here's the number 73. Isn't it cool? Here are some other things that had to do with the number 73." That anecdote about the taxi cab number was the only somewhat interesting point to make from either a sports or a math perspective.

      But I like Whipslash. Baby steps.

    9. Re:Editing... by Hylandr · · Score: 1

      I think I should have summarized it better as 'Low quality click-bait'.

      Sorry, but calling it as I see it.

      --
      ~ People that think they are better than anyone else for any reason are the cause of all the strife in the world.
    10. Re:Editing... by CauseBy · · Score: 1

      Dude, Slashdot is news for nerds; this is news and it's the nerd angle on the story. It's center-bullseye Slashdot material.

    11. Re:Editing... by Hylandr · · Score: 0

      Gushing over a number is not *news that matters*

      --
      ~ People that think they are better than anyone else for any reason are the cause of all the strife in the world.
    12. Re:Editing... by Rakarra · · Score: 1

      I think I should have summarized it better as 'Low quality click-bait'.

      Sorry, but calling it as I see it.

      Oh. Yes, you're absolutely right with that.
      I still think the taxi anecdote is amusing, but it's definitely more of a casual numerology blog post and not a newsworthy story.

    13. Re:Editing... by BronsCon · · Score: 1

      "News for Nerds" and "Stuff that Matters" are two separate clauses. Not all news for nerds matters and not all stuff that matters is news for nerds, but it all belongs here.

      --
      APK quotes people (including myself) without context and should not be trusted. Just thought you should know.
    14. Re:Editing... by Hylandr · · Score: 0

      That was beyond disgusting.

      --
      ~ People that think they are better than anyone else for any reason are the cause of all the strife in the world.
    15. Re:Editing... by whipslash · · Score: 1

      Huh?

    16. Re:Editing... by whipslash · · Score: 1

      You seem fun at parties

    17. Re:Editing... by Hylandr · · Score: 1

      You're implying parties are required for social acceptance or affluence.

      Please read between the lines.

      --
      ~ People that think they are better than anyone else for any reason are the cause of all the strife in the world.
    18. Re:Editing... by whipslash · · Score: 2

      You're a bit of a nitpicky whiner though

    19. Re:Editing... by Hylandr · · Score: 1

      It's a shame AOL couldn't keep your kind locked away.

      --
      ~ People that think they are better than anyone else for any reason are the cause of all the strife in the world.
    20. Re:Editing... by whipslash · · Score: 1

      Good one

  2. At last! News for nerds... by Anonymous Coward · · Score: 1

    My God, it's full of stars...

  3. Base 10 by Iamthecheese · · Score: 4, Interesting

    What's so special about base 10? There are other primes in base 9 that are also prime when the digits are reversed. And base 8. Does it really provide any useful information?

    --
    If video games influenced behavior the Pac Man generation would be eating pills and running away from their problems.
    1. Re:Base 10 by BronsCon · · Score: 1

      And when you get down to base 2 it seems like every other number is a prime and there are quite a lot of emirps in that set. ;)

      --
      APK quotes people (including myself) without context and should not be trusted. Just thought you should know.
    2. Re:Base 10 by mrchaotica · · Score: 3, Informative

      Not to mention, at what point does a number being "interesting" stop being mathematics and start being numerology? I mean, are things like taxicab numbers and 'emirps' useful for anything?

      --

      "[Regarding the 'cloud,'] ownership was what made America different than Russia." -- Woz

    3. Re:Base 10 by Anonymous Coward · · Score: 0

      Primes, in all bases, are highly useful in many areas, encryption being a good one most people likely know of.

      Engineering is another area, prime-sizing, matrices and so many practical uses.

    4. Re:Base 10 by Anonymous Coward · · Score: 0

      ... if you're not talking about altering the order of the digits, then there is absolutely no difference between primes in base 2, base 9 or whatever base you choose. In case that isn't obvious ;p

    5. Re:Base 10 by narcc · · Score: 1

      Can you provide an example of a number that is prime in base 2, but not prime when converted to base 10?

      No, no you can not.

    6. Re:Base 10 by BronsCon · · Score: 2

      Bah... yeah, brain fart. I'm on painkillers for my back at the moment, so... there's that. I realized my folly while writing up an explanation of how 9 is a prime in base 2 (1001)... which, of course, is not true.

      --
      APK quotes people (including myself) without context and should not be trusted. Just thought you should know.
    7. Re:Base 10 by ShanghaiBill · · Score: 5, Interesting

      Not to mention, at what point does a number being "interesting" stop being mathematics and start being numerology?

      There are no uninteresting numbers. Proof: Assume N is the smallest uninteresting number. That property in itself makes it interesting. Therefore there can be no smallest uninteresting number, so logically uninteresting numbers cannot exist. QED.

      I mean, are things like taxicab numbers and 'emirps' useful for anything?

      There is no requirement that mathematics be useful. Many fields of math, including non-Euclidian geometry, trans-infinite set theory, etc. were developed long before there were any applications. The Greeks and Romans had no use for zero. Some mathematicians consider it a badge of honor to work on a topic that is considered purely theoretical, and therefore useless.

    8. Re:Base 10 by ShanghaiBill · · Score: 4, Informative

      Primes, in all bases, are highly useful in many areas, encryption being a good one most people likely know of.

      Engineering is another area, prime-sizing, matrices and so many practical uses.

      Also biology. Cicadas and locusts tend to appear in cycles based on primes, such as every 13 or 17 years. If they instead used a composite period, like, say 12, then they could be prey to predators that had a 3, 4, or 6 year cycle.

      For the same reason, machinery sometimes use gears or belts with a prime number of teeth. That can reduce vibrations by eliminating some possible resonances.

    9. Re:Base 10 by drew_kime · · Score: 1

      There are no uninteresting numbers. Proof: Assume N is the smallest uninteresting number. That property in itself makes it interesting. Therefore there can be no smallest uninteresting number, so logically uninteresting numbers cannot exist. QED.

      I believe that's the ontological proof that you're a total nerd.

      --
      Nope, no sig
    10. Re:Base 10 by Anonymous Coward · · Score: 0

      "As soon as you discard scientific rigor, you're no longer a mathematician, you're a numerologist."
      -- Sol Robeson in the movie "Pi" (1998)

    11. Re:Base 10 by PopeRatzo · · Score: 1

      I'm on painkillers for my back at the moment, so.

      I hope you brought enough for the whole class, Mr BronsCon.

      --
      You are welcome on my lawn.
    12. Re:Base 10 by BronsCon · · Score: 1

      But, then, who would call me on my shenanigans?

      --
      APK quotes people (including myself) without context and should not be trusted. Just thought you should know.
    13. Re:Base 10 by Empiric · · Score: 1

      I think your username and mine now compels me to assert I am indeed useful for something, at least on a coincidental, or "co-incidental", level... depending on one's notion of what is co-incidenting.

      --
      ~ Whence do you come, slayer of men, or where are you going, conqueror of space?
    14. Re:Base 10 by John+Allsup · · Score: 1

      Even if emirps and taxicab numbers are not useful for anything, the techniques developed in proofs of assertions about things have a habit of being useful elsewhere, and the mere pondering of such things is good exercise for mathematical reasoning, and fun for those who like maths. That fun aspect should not be underrated: if you don't enjoy maths, you will tend to limit yourself only to that which has an immediately obvious usefulness. Read up on the history of maths to see how that could be a problem.

      --
      John_Chalisque
    15. Re:Base 10 by BlackPignouf · · Score: 3, Interesting

      There are no uninteresting numbers. Proof: Assume N is the smallest uninteresting number. That property in itself makes it interesting. Therefore there can be no smallest uninteresting number, so logically uninteresting numbers cannot exist. QED.

      Your proof is flawed, because it cannot work recursively. What about the second smallest uninteresting number? Your argument only reduces the set of uninteresting numbers by one, and until proven otherwise, there are an infinity of uninteresting numbers.
      BTW, 12407 seems to be the smallest uninteresting number http://www.kevinhouston.net/bl..., which, as you mentioned, makes it interesting. The next smallest uninteresting number really is uninteresting, and I don't even know which one it is :)

    16. Re:Base 10 by Anonymous Coward · · Score: 0

      ""Proof: Assume N is the smallest uninteresting number." Who gives a fuck.
      (Ergo your "proof" is seriously flawed.)

    17. Re:Base 10 by retchdog · · Score: 1

      he just "proved" there isn't a first uninteresting number, so there can't possibly be a second. or a third. or so on.

      idiot.

      --
      "They were pure niggers." – Noam Chomsky
    18. Re:Base 10 by jthill · · Score: 1

      All bases are base 10 in their own eyes. Special enough for you?

      --
      As always, all IMO. Insert "I think" everywhere grammatically possible.
    19. Re:Base 10 by BlackPignouf · · Score: 1

      I might be an idiot, but you'll have to prove it ;)
      His proof is still flawed. It looks like mathematical induction (https://en.wikipedia.org/wiki/Mathematical_induction), but it really only is the base case, and there's no inductive step.
      Let's say that 12407, 12887, 13258, 13794 are the first uninteresting numbers, because they don't have any special property, and for example don't appear in https://oeis.org/.
      12407 is the first uninteresting number, so let's agree this property makes it interesting. What about 12887? It's still uninteresting, and it cannot be the first uninteresting number, because then, what would happen to 12407? They cannot be both the first uninteresting numbers, can they? You might consider the second uninteresting number to be interesting, but what about the 13794th uninteresting number?

      PS: I suppose this argument cannot be settled, because "interesting/uninteresting" isn't properly defined.

    20. Re:Base 10 by serviscope_minor · · Score: 1

      I mean, are things like taxicab numbers and 'emirps' useful for anything?

      Who cares? Is the Mona Lisa useful for anything?

      --
      SJW n. One who posts facts.
    21. Re:Base 10 by Anonymous Coward · · Score: 1

      The proof is indeed flawed, solely for the lack of proper definiton of interesting. But it does not use induction at all, it uses that natural numbers are well-ordered.

      - Let S be the set of noninteresting numbers.
      - If S is not empty then, since N is well-ordered, there exists a minimum element x of S
      - x in interesting, so x is not in S
      Contradiction, cannot happen that x belongs to S and does not belong to S.

      Hence S is emptyset.

    22. Re: Base 10 by Anonymous Coward · · Score: 0

      Dang it. Now I have to think about whether the plural is 'emirps' or 'semirp.'

    23. Re: Base 10 by Anonymous Coward · · Score: 0

      All your base are belong to us.

    24. Re:Base 10 by mrchaotica · · Score: 1

      Is the Mona Lisa useful for anything?

      Is the Mona Lisa mathematics?

      --

      "[Regarding the 'cloud,'] ownership was what made America different than Russia." -- Woz

    25. Re:Base 10 by cellocgw · · Score: 1

      As long as we're abusing inductive proofs, might as well point out that all prime numbers are odd.

      Step One: all prime numbers except "2" are odd numbers.
      Step Two: that makes "2" a pretty odd prime number...

      --
      https://app.box.com/WitthoftResume Code: https://github.com/cellocgw
    26. Re:Base 10 by Anonymous Coward · · Score: 0

      It's amusing to think that Nature has applied a sieve algorithm to lifecycles. It's a truly naturally occurring algorithm.

    27. Re:Base 10 by serviscope_minor · · Score: 1

      Is the Mona Lisa mathematics?

      What's that got to do with anything? Is it *useful*.

      If not, then what's with the obsession that good things must have use, but only when it comes to mathematics?

      Many mathemeticians don't do maths because it's useful in the same way many artists don't do art because it's useful. Both have their uses, but that's not why we do them.

      --
      SJW n. One who posts facts.
  4. Oetaxicab? What? by wonkey_monkey · · Score: 1

    This was the first of what came to be known as 'oetaxicab numbers.'

    A what number?

    "It is the sixth 'emirp.' An emirp, he explained, is a prime number that remains prime when its digits are reversed. (Emirp, of course, is 'prime spelled backward.)

    You've got something weird going on with your quotes there.

    --
    systemd is Roko's Basilisk.
  5. emirps not good for all bases by Anonymous Coward · · Score: 0

    Although 73 works for binary, but not hex.

  6. Coincidentally, 1973 by Anonymous Coward · · Score: 0

    Was also the last really good year for American pop music, before disco took over. Then came the '80s.

    That ended a 75 year run. Look it up.

    1. Re:Coincidentally, 1973 by Anonymous Coward · · Score: 0

      1973 was the birth of disco, thanks to the genius of one man!

      https://www.youtube.com/watch?v=8YS7sWCG_ZE

    2. Re:Coincidentally, 1973 by Anonymous Coward · · Score: 0

      Coincidentally, 1973 was also the last really good year for American pop music.

      Not so coincidentally, you were born in 1961.

    3. Re:Coincidentally, 1973 by Applehu+Akbar · · Score: 1

      "Was also the last really good year for American pop music, before disco took over. "

      Also the year of my first really good relationship.

    4. Re:Coincidentally, 1973 by Evtim · · Score: 1

      As I always say at least two great events occurred in 1973. One was the "Dark side of the moon" release, the other....my birth :)

  7. Strange way to promote a movie by JoeyRox · · Score: 3, Informative

    Find the most tenuous connection between the number 73 and sporting events and then talk about the plot of a completely unrelated movie.

    1. Re:Strange way to promote a movie by Potor · · Score: 1

      I have no problems with this. I had no idea this film was in production, and now I can't wait to see it. Plus I love hoops....

    2. Re:Strange way to promote a movie by Anonymous Coward · · Score: 0

      Ono was supposed to give a number theory talk here and spent most of it plugging the movie instead.

      I'm not sure there's a better way to make me avoid something like the plague.

  8. Simplest Ramanujan anecdote ... by 140Mandak262Jamuna · · Score: 4, Interesting
    The taxi cab numbers is the simplest anecdote from Ramanujan that could be told to general audience. Rest of his stuff are so far out, it is impossible to describe to even highly educated engineers. Really sad he died so young.

    But Ramanujan was never taught the process of writing down formal proofs, he self thought everything from a handbook of mathematical identities. Rediscovering several things others had already discovered and proved. He was utterly at a loss to explain how he was able to do math. He simply said, "I look at the equation or a problem. Then Goddess Namagiri Devi writes the answer in my tongue and I recite it". (not an accurate quote, paraphrased by me)

    I wish it was Lord Oppiliappan, the family deity of his dad, not Namagiri Devi the consort of the family deity of his mom. Because Lord Oppiliappan is my family deity too. Would have gotten me some bragging rights.

    --
    sed -e 's/Chuck Norris/Rajnikant/g' joke > fact
    1. Re:Simplest Ramanujan anecdote ... by Mes · · Score: 1

      Interesting, but that leads me to wonder why he was sure it was Namagiri Devi and not another?

    2. Re:Simplest Ramanujan anecdote ... by Anonymous Coward · · Score: 0

      In other words, he approached mathematics like a painter or a poet approaches their art.

    3. Re:Simplest Ramanujan anecdote ... by Anonymous Coward · · Score: 0

      How do I know you wrote that post and not some interdimensional idiot-lord?

    4. Re:Simplest Ramanujan anecdote ... by shawn2772 · · Score: 5, Interesting

      The taxi cab numbers is the simplest anecdote from Ramanujan that could be told to general audience.

      It's recently been discovered that there is a specific reason that Ramanujan recognized the property of 1729... and it's even more mind-boggling than the idea that Ramanujan simply saw such obscure properties in random numbers.

      As it turns out, Ramanujan was thinking about Fermat's Last Theorem and had written the two sum-of-cubes decomposition of 1729 in some of his papers, as part of an exploration of FLT "near misses", numbers that are almost, but not quite, counterexamples to FLT. What's really incredible, though, was that careful study of his papers reveal that he was in the process of developing a theory of elliptic curves... moving exactly towards the technique that Andrew Wiles used to finally prove FLT in 1994/95, some 75 years after Ramanujan's death.

      Given Ramanujan's highly intuitive approach to mathematics, what this most likely means is that Ramanujan somehow just saw the structure of elliptic curve theory and its relation to FLT. Andrew Wiles is clearly one of the most brilliant mathematicians of our day, and he was only able to make and prove this connection with years of intense work and only by building upon a mass of thoroughly developed elliptic curve theory, including the Taniyama-Shimura conjecture which was proposed 35 years after Ramanujan's death, and not observed to be related to FLT until the another 30 or so years after that.

      So when Hardy mentioned 1729 to Ramanujan and was surprised at Ramanujan's observation of the number's properties, he thought that it was just evidence that Ramanujan saw odd patterns in numbers, but it was actually evidence of vastly deeper insight into the structure of number theory.

      https://plus.maths.org/content/ramanujan

      Really sad he died so young.

      Really, really sad.

      He was utterly at a loss to explain how he was able to do math. He simply said, "I look at the equation or a problem. Then Goddess Namagiri Devi writes the answer in my tongue and I recite it".

      That's not completely true. Yes, he did say that, but he was also capable of producing proofs of a sort. He tended to skip a lot of steps that were -- to him -- too obvious to bother stating, and which everyone else had to think very hard about[*], but he could and did produce work that was understandable with appropriate background and sufficient study. It seems likely that had he lived longer and obtained more formal mathematical education that he'd have developed his ability to produce formal proofs for publication.

      Ramanujan was a simply incredible mathematical intellect. I have no doubt that if he'd lived a full life he'd have done great work to advance mathematics.

      [*] Mathematicians' definition of "obvious" is rather vague. One of my favorite math jokes is about a professor lecturing to his class and saying "It's obvious that...". A student raised his hand and said "Is that obvious? I don't see it". The professor looked at the board for a long minute then walked out of class, went to his office, scribbled furiously for 20 minutes then returned to class and said "Yes, it is obvious." He then continued his lecture without further elaboration.

    5. Re:Simplest Ramanujan anecdote ... by Hognoxious · · Score: 0

      "I look at the equation or a problem. Then Goddess Namagiri Devi writes the answer in my tongue and I recite it".

      I suspect that deity channelling will be appearing on job requirements for H1Bs pretty soon.

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    6. Re:Simplest Ramanujan anecdote ... by BlackPignouf · · Score: 1

      Good joke, and interesting story.
      I'm kinda good at maths, but an old pal is a few sigmas better than me. During our (math) studies, teachers realized pretty fast that he was more talented than they were. We were jealous of him, not only because he was *that* good, but also because he could write "That's obvious" 10 times in a row during an exam, skip every question till the very last, write only a few sentences and still get the best grade.

    7. Re:Simplest Ramanujan anecdote ... by Anonymous Coward · · Score: 0

      I think it is awesome that you have a family deity. D'ems bragging rights in itself.

    8. Re:Simplest Ramanujan anecdote ... by Applehu+Akbar · · Score: 4, Interesting

      "But Ramanujan was never taught the process of writing down formal proofs, he self thought everything from a handbook of mathematical identities. Rediscovering several things others had already discovered and proved. He was utterly at a loss to explain how he was able to do math. He simply said, "I look at the equation or a problem. Then Goddess Namagiri Devi writes the answer in my tongue and I recite it". (not an accurate quote, paraphrased by me)"

      The other mathematician who was self-taught in the same way was Blaise Pascal. He even invented his own terminology for conventional geometric forms because his family kept him away from formal study.

  9. it seems a lot of number theory is just numerology by Anonymous Coward · · Score: 0

    prime and emirp? WTF does that matter? It's a meaningless observation.

    Of course there are mathematical relationships between the digits of numbers and factorization.

    But, change the base and everything changes. Why? because:

    base : char encoding
    as
    a number : code point

    Thus spending time analyzing the relationships between digits in one base for one number seems a waste of time.

  10. One cubed? by Anonymous Coward · · Score: 0

    One cubed seems like cheating.

  11. I thought it was... by Anonymous Coward · · Score: 0

    ...42.

    1. Re:I thought it was... by mcswell · · Score: 1

      You may be on to something: 73 is the sixth emirp (as mentioned in the OP). But even more significantly, 73 = 42 + 31, where 31 is the third emirp.

      I'm sure that's significant...

  12. Re:it seems a lot of number theory is just numerol by RghtHndSd · · Score: 1

    As a number theorist at an R1 university, I agree with this after one insertion is made. It seems that a lot of amateur number theory is just numerology. At it still can be quite entertaining.

  13. Are you kidding me! by downright · · Score: 0

    Slashdot declines my post on the number 12 and puts out this clearly biased post on the number 73! This is a mainstream media scandal. 12 might leave the numberline and become an independent number if it doesn't get treated fairly.

    1. Re:Are you kidding me! by downright · · Score: 0

      What is special about 12?

      Tuesday was the 12th
      There are 12 months in the year
      There are 12 in a dozen
      There are 12 inches in a foot.

      See 12 is WAY better than stupid 73.

    2. Re:Are you kidding me! by mcswell · · Score: 1

      > There are 12 inches in a foot.

      Yeah, but there are only 10 toes on my foot.

  14. Re:it seems a lot of number theory is just numerol by Potor · · Score: 1

    What you don't seem to care about though is the fascination with the idea that numbers, in whatever base, express reality.

    Working through "the relationships between digits" is simply a primitive form of a deeper insight.

  15. Real meaning of 73 by bromoseltzer · · Score: 2

    "73" is well known in the telegrapher community as the code for "Best Wishes". It is commonly used in ham radio to this day.

    --
    Fiat Lux.
    1. Re:Real meaning of 73 by bromoseltzer · · Score: 1

      (or "best regards")

      --
      Fiat Lux.
  16. GO SPURS!!! by zenlessyank · · Score: 1

    Time to teach Golden State some new math.

    1. Re:GO SPURS!!! by Anonymous Coward · · Score: 0

      Yes! Pop has something up his sleeve for them. He used his B playbook the other day to let them get the record, but he will hit them with everything he's got in the playoffs.

  17. I think I speak for all of us when I say, by wkwilley2 · · Score: 1

    NERDS!

    --
    Have you ever fallen asleep at the keybhanusdiog?
    1. Re:I think I speak for all of us when I say, by Curate · · Score: 1

      Ramanujan must have gotten on very well with the ladies.

  18. Surprising? by Anonymous Coward · · Score: 0

    Huh. I wonder why the math professor found it surprising that MJ was a strong math student?

  19. Beware of the numbers by U2xhc2hkb3QgU3Vja3M · · Score: 1
  20. It is not 6th emirp by u19925 · · Score: 1

    The article defines emirp as below:

    “It is the sixth ‘emirp.’ ” An emirp, he explained, is a prime number that remains prime when its digits are reversed.

    Here are the emirp numbers: 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73. So it is eleventh emirp.

    1. Re:It is not 6th emirp by hguorbray · · Score: 1

      Uuh -I would guess that single digit numbers are not considered emirps since it is impossible (or pointless) to reverse a single digit # (except typographically, of course) since you end up with the same value, wheras, except for 11 (which may also not be an emirps) any 2 digit or greater number can be reversed to come up with a different value. ...The whole point of emirps being the properties of a number that has actually been reversed

      -I'm just sayin'

    2. Re:It is not 6th emirp by Wraithlyn · · Score: 3, Informative

      The actual definition is "a prime number that results in a different prime when its decimal digits are reversed."

      So, single digits, and palindromes (like 11) don't count.

      --
      "Mind, as manifested by the capacity to make choices, is to some extent present in every electron." -Freeman Dyson
    3. Re:It is not 6th emirp by Anonymous Coward · · Score: 0

      Actually, I don't know why people don't realize that observations like these expressed in base 10 (or anything other than base 2) are mostly meaningless.

  21. 11 is better by Anonymous Coward · · Score: 0

    just sayin

  22. Yes! Available on Netflix by Applehu+Akbar · · Score: 1

    Added to queue. Netflix still rocks.

  23. one CAPTCHA: perfect by Anonymous Coward · · Score: 0

    This is why people have lost respect for science.

  24. Sheldon's 73 shirt by bakes · · Score: 1

    I can't believe nobody has yet mentioned this clip: https://www.youtube.com/watch?...

    This is why Sheldon often wears a blue shirt with the number 73 on it.

    --
    Ho! Haha! Guard! Turn! Parry! Dodge! Spin! Ha! Thrust!
  25. Re:it seems a lot of number theory is just numerol by iggymanz · · Score: 1

    numbers are just constructs of the human mind; reality is independent of them even if we can make useful models of reality with numbers.

  26. Penguin by bestweasel · · Score: 1

    I first saw that story about Rajamujan and Hardy in The Penguin Dictionary of Curious and Interesting Numbers which gave me hours of numerical pleasure.

  27. 1729 by sgunhouse · · Score: 1

    Strangely, when my advisor told me that story he said it was a house number ...

  28. 73rd comment!! by Anonymous Coward · · Score: 0

    73!!!!

  29. All numbers are interesting. Proof attached. by Anonymous Coward · · Score: 0

    Mathematicians have a running joke that all numbers are interesting.

    The proof is by contradiction. The integers are a well-ordered set. Consider the smallest uninteresting number. Very interesting, isn't it?

  30. Fixed... you keep using that word, by rmdingler · · Score: 1

    Still, I don't see it yet as a whipslash tag.

    --
    Happiness in intelligent people is the rarest thing I know.

    Ernest Hemingway

    1. Re:Fixed... you keep using that word, by whipslash · · Score: 1

      What?

    2. Re:Fixed... you keep using that word, by rmdingler · · Score: 1
      --
      Happiness in intelligent people is the rarest thing I know.

      Ernest Hemingway