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83,431 Recited Digits of Pi

i_like_spam writes "59-year-old Akira Haraguchi of Japan recently broke the world record for the recited number of digits of Pi. Haraguchi-san recited an amazing 83,431 digits of Pi during a 13-hour overnight stretch. This almost doubles the previous record of 42,195 digits by fellow Japanese Hiroyuki Goto. Though it is not yet updated to reflect the new record, the Pi-World-Ranking-List has the rules for participation and breaks down the ranking by world, continent, and country. Links to world rankings for memorized digits of E and Sqrt(2) are also given."

67 of 433 comments (clear)

  1. Miscalculation? by Adrilla · · Score: 4, Informative

    Haraguchi-san recited an amazing 83,431 digits of Pi during a 13-hour overnight stretch. This more than doubles the previous record of 42,195 digits by fellow Japanese Hiroyuki Goto.

    Um, I'm not a math major, but since when is 83,431 > 84,390, which is double the amount of 42,195? You don't even need a calculator to figure that one out. But as far as the accomplishment goes: That's a simply amazing feat, I applaud Haraguchi greatly, How do you memorize a number that deep, I can barely remember what I had for breakfast.

    --

    "Plans are for fools! Oglethorpe, the plutonian (Aqua Teen Hunger Force)
    1. Re:Miscalculation? by Anonymous Coward · · Score: 2, Funny

      Understandable. Had you been a *physics* major you would have noticed that he recited pi at a *faster* rate than the previous guy and thus the metric of the frame of reference gets *dilated*, giving just a bit over the aformentioned factor of 2.

    2. Re:Miscalculation? by BJH · · Score: 3, Interesting

      Numbers from 1-10 in Japanese each have a reading associated with them (1=hi, 2=fu, 3=mi...) that makes it easier to form them into mnemonics than in English.

      So it wasn't as hard as it looked - he just memorised an 83,431 syllable mnemonic.

    3. Re:Miscalculation? by Chess_the_cat · · Score: 4, Insightful
      The same way people used to memorize 500 page long epic folk poems

      Did they memorize them character by character?

      --
      Support the First Amendment. Read at -1
    4. Re:Miscalculation? by i_like_spam · · Score: 5, Informative

      To set the record straight...

      ...as a mistake, I initially typed '84,431', which more than doubles the previous record. After finding and correcting my numerical mistake, I forgot to change 'more than doubles' to 'nearly doubles'. Oops.

    5. Re:Miscalculation? by baadger · · Score: 2, Informative

      The preceeding sentence to "This more than doubles the previous record" mentions time, which suggests to me the record it refers to is a measure of performance of reciting Pi - measured by the rate of recital, not the number of digits managed.

      The reason time wasn't mentioned in the claim i.e. "this more than doubles the previous record of 21,195 digits in X hours" is most likely because the information wasn't available to the submitter.

    6. Re:Miscalculation? by ilikejam · · Score: 5, Funny

      So this guy recites 83,431 digits, and you can't type 5?

      --
      C-x C-s C-x k
    7. Re:Miscalculation? by joNDoty · · Score: 2, Funny

      Uh, you're probably not an English major either because you misquoted the article, "This almost doubles the previous record of 42,195 digits by fellow Japanese Hiroyuki Goto."

      ...unless they recently fixed the article text?

    8. Re:Miscalculation? by Anonymous Coward · · Score: 5, Informative

      No. They reiterate a formula in their head.

      http://mathworld.wolfram.com/BBPFormula.html

    9. Re:Miscalculation? by danharan · · Score: 3, Interesting

      Check out the Mnemonic alphabet.

      Take a series of letters, makes nouns, create your own poem or story. Link words and phrases with absurd images (the more absurd, the better), and you suddenly can remember long series of numbers.

      --
      Information: "I want to be anthropomorphized"
    10. Re:Miscalculation? by Rylz · · Score: 2, Funny

      The same way people used to memorize 500 page long epic folk poems

      Did they memorize them character by character?

      No, I believe they memorized them by their hex codes in ASCII (or maybe UTF-8 or UTF-16 if they wanted to be more universal).

      --
      Sometimes you've gotta roll the hard six.
    11. Re:Miscalculation? by mbrewthx · · Score: 4, Interesting

      Hey Mods, Mod parent UP!!!!!!

      My son has Aspergers sysdrome, Which is a type of Autism) and I can see him doing this. He memorizes movies, by chapter and time. With his Star Wars movies he can see a small clip and tell you the chapter and time on the DVD, and that is light weight lifting for him. It's not a photographic memory but like a database which him can sort and link with other databases in his mind and do it extremely fast. I'm going to start teaching him a programming language this summer and a Linux box to his desk.

      Remember that the the Autism spectrum is very broad and goes from people who need to be in institutions and on the of side of the sprectrum those who we would consider just a excentric.
      I know we just think about Rain Man when we hear Austism.

      We need to look past that and see the potential, My son is only 8 and yes he can be frustrating at times but I can't wait to see what he can do in the future.

      Well I got to go. Have a list to finish
      1)Buy matching suits for son and I
      2)go to Vegas and play Black JAck
      3) ?
      4) PROFIT!!!!

      --
      __________ Leave me alone I'm compiling a RPG II program on my S/36...Thanks to metamucil I'm a Regular Meta Moderator
    12. Re:Miscalculation? by suwain_2 · · Score: 2, Funny

      I'd like to reply to this thread, but I can't think of anything that ends in "am" to say I like.

      (Read the usernames if you're confused.)

      --
      ________________________________________________
      suwain_2 :: quality slashdot p
    13. Re:Miscalculation? by CausticPuppy · · Score: 2, Funny

      Numbers from 1-10 in Japanese each have a reading associated with them (1=hi, 2=fu, 3=mi...) that makes it easier to form them into mnemonics than in English.

      Actually English has that too. It sounds something like "wun," "tooh," "three"....

      --
      -CausticPuppy "Of all the people I know, you're certainly one of them." -Somebody I don't know
  2. Actually by Anonymous Coward · · Score: 5, Funny

    She only recited 10, the other numbers were just dupes.

  3. (lame comment) by moz25 · · Score: 4, Funny

    A 59-year-old Japanese psychiatric counselor set a world record of sorts Sunday by reciting "pi," or the ratio of the circumference of a circle to its diameter, to 83,431 digits.

    Good, now she can counsel herself on having more exciting things to do than learning and reciting the digits of a number anyone of us can look up.

  4. Good times. by Ceirren · · Score: 5, Funny

    When i think of hobbies, learning a sequence of 83,000 digits sounds like a good time.

  5. Still a t-shirt by moz25 · · Score: 2, Informative

    For the beginning reciters among us, we at least still have a nice t-shirt with the first 4493 digits of Pi in the shape of the Pi symbol.

  6. Re:No life by The+New+Andy · · Score: 5, Funny
    I'm sorry but what does this prove? When I need pi 3.1459 is enough for me...

    Some would say that 3.1459 is more than enough.

    (I tried to hold back - I really did)

  7. Rank list goes down to 50? by slavemowgli · · Score: 2, Interesting

    Why does the rank list go down to 50 digits? Surely there are many people in the world who can recite more than 50 digits of pi that aren't listed here, so unless these people are noteworthy for some other reason, their inclusion seems a bit pointless.

    --
    quidquid latine dictum sit altum videtur.
  8. Wait a minute? by FhnuZoag · · Score: 5, Interesting

    How do you know they are reciting, and not actually working it all out as they go along?

    1. Re:Wait a minute? by GigsVT · · Score: 5, Interesting

      Not sure if you were kidding or not.

      Solving Pi algorithmically in your head would be a larger feat than memorizing it.

      --
      I've had enough abrasive sigs. Kittens are cute and fuzzy.
  9. His wife must be proud! by Mr.+Maestro · · Score: 5, Funny

    Wait..er...the odds of him actually having a girlfriend are 83,431 to 1.

  10. People by suso · · Score: 2, Insightful

    When I think of people. I think that there are a lot of them. More than 6 billion actually. It would seem that there is enough people that there would be people doing all kinds of things, including memorizing digits of Pi. I'm sure there is also a whole underground group of people who memorize digits of e and are disgruntled because the pi memorizing people get more attention.

    1. Re:People by MyLongNickName · · Score: 5, Funny

      I memorized i. People memorizing Pi and e are too irrational for my tastes.

      --
      See my journal for slashdot ID's by year. Mine created in 2005. http://slashdot.org/journal/289875/slashdot-ids-by-year
    2. Re:People by Ceirren · · Score: 5, Funny

      Pft you memorized i? Come back when you memorize a real number.

    3. Re:People by MyLongNickName · · Score: 5, Funny

      Well, I also memorized 1/3. However, the competition has been going on for 73 days now, and I'm not sure I can keep going much longer.

      What does it take to be number 1? Two is not a winner, and three no one remembers...

      --
      See my journal for slashdot ID's by year. Mine created in 2005. http://slashdot.org/journal/289875/slashdot-ids-by-year
    4. Re:People by statemachine · · Score: 2, Funny

      Too complex for me. I like to keep it real.

    5. Re:People by patio11 · · Score: 3, Funny

      And be a square? Never!

  11. That's a slow storage device by G4from128k · · Score: 5, Interesting

    83,431 digits is about 33.8 kB of data. Read out over 13 hours means the data rate averages under 6 baud -- and I thought 110 baud modem on a teletype was slow.

    I don't even want to think about the write speed of this storage device. At least the storage capacity of the device has nearly doubled (from 42,195 digits or 17.1 kB).

    --
    Two wrongs don't make a right, but three lefts do.
    1. Re:That's a slow storage device by BioCS.Nerd · · Score: 2, Interesting

      Interesting post :) Just to throw my $0.02 in, the vocal cords and ears can act as a bottle neck skewing the actual rates of data transport.

  12. I can do that too by alewar · · Score: 2, Funny

    Not with Pi, but for example with 1/3 and even with 2/3!

  13. i heard about this sort of thing by St.+Arbirix · · Score: 5, Funny

    bash.org #98
    i don't have hard drives. i just keep 30 chinese teenagers in my basement and force them to memorize numbers

    --
    Direct away from face when opening.
  14. Re:Google it by tehshen · · Score: 2, Interesting
    --
    Guy asked me for a quarter for a cup of coffee. So I bit him.
  15. My Law by MyLongNickName · · Score: 5, Interesting

    A person has a fixed amount of mental capability. This capability is divided into three categories:
    1) Memorization
    2) Logical Thinking
    3) Wasted watching 'Surivor'.

    The more time you spend on #1, the less you have for #2 and #3. The more on #2, the less for #1 and #3. The more on #3, the less for #1 and #2.

    Note that Albert Einstein was not considered to have a super high IQ by "world changing genius" standards. But the dude could not even remember his phone number or address. Clearly he robbed #1 to get more #2.

    I am not sure what this counselor's total intelligence is. But she sure wasted precious brain cells on something that is irrelevant (3.141592654 gives you the circumference of the earth to within a centimeter given its diameter), and easily looked up.

    --
    See my journal for slashdot ID's by year. Mine created in 2005. http://slashdot.org/journal/289875/slashdot-ids-by-year
    1. Re:My Law by Cow+Jones · · Score: 4, Interesting

      But she sure wasted precious brain cells on something that is irrelevant (3.141592654 gives you the circumference of the earth to within a centimeter given its diameter), and easily looked up.

      You're missing the point - this is not about doing something useful, it's about proving that it can be done by a human. For the same reason people hold sports competitions: that somebody can jump 2.40 meters high is also irrelevant per se, but it sure is an impressive thing for a human to do.

      Your theory about the 3 capacities is interesting, but as it stands, it's just that: a theory. I for one think it is more likely that the brain can be trained, and through training can expand its capacity. Certainly the concentration required to memorize large numbers will be beneficial when we try to think logically.

      --

      Ah, arrogance and stupidity, all in the same package. How efficient of you. -- Londo Mollari
  16. Sig. Figs by TerranFury · · Score: 2, Interesting

    Ever heard of significant figures? Show me a sensor that can return values with 83,431 digits of precision!

    NASA got to the moon with fewer than 12 digits of Pi...

  17. Obligatory Simpsons... by DarkBlackFox · · Score: 4, Funny

    Lawyer: Mr. Nahasapeemapetilon, have you ever forgotten anything?

    Apu: No. In fact, I can recite pi to 50,000 places. The last digit is 1.

    Homer: Mmmm.... Pi.

    1. Re:Obligatory Simpsons... by Adrilla · · Score: 2, Funny

      I guess I'll repost my corny pi joke from high school.

      In ninth grade algebra, I walk into class and the teacher had put an infinity symbol on the whiteboard.
      I, being the smart ass I am says,
      "Mr. Dewey, who killed eight?"
      Mr. Dewey says without missing a beat,
      "Pi...It's an irrational number."

      --

      "Plans are for fools! Oglethorpe, the plutonian (Aqua Teen Hunger Force)
  18. Explain by slobber · · Score: 5, Insightful

    You think that's funny? Then please explain to me why, for example, devoting your life to run 100 meters faster than any other human is not considered funny? Is it because the latter pays unbelievably well if you succeed? Laugh all you want but frankly, I don't see much of a difference...

    --
    "You mortals are so obtuse." -Q
    1. Re:Explain by sevinkey · · Score: 2, Insightful

      since when has dedicating your life to running the 100 meter dash not funny? I'm laughing at both, although I'm happy for them that they've found some life goal that makes them happy.

      I know for a fact people laugh at me on those occasions I'd rather work out an idea in front of the computer on a Friday night instead of going out :)

      To each their own. Hell, first thing I did on a Saturday morning is made this post to slashdot!

  19. Well Done by Quick+Sick+Nick · · Score: 2, Funny

    It's a good thing we have people to do this so computers don't have to.

  20. More math genius by arturov · · Score: 3, Funny
    Haraguchi-san recited an amazing 83,431 digits of Pi during a 13-hour overnight stretch. This more than doubles the previous record of 42,195 digits by fellow Japanese Hiroyuki Goto.

    This is the math section? I love it.

  21. Brain cells are never wasted by Anonymous Coward · · Score: 2, Interesting

    There's never been evidence of someone learning so much that they couldn't learn any more. No double majors in physics and medicine who eventually become doctors wake up one morning at thirty to discover, mon dieu! It's impossible to remember anything new!

    Certainly memories degrade, but that decay seems to be entirely linked to age.

    Indeed, it seems like people who memorize more start to learn *faster,* because they have information they can relate other information to. If you know an 80,000 digit number sequence, all sorts of sequences are going to be immediately familiar. "That's a lot like 592307816," you say of someone's last name. Why does the last name remind you of that sequence? It's hard to say, but it does, and that helps you remember the name.

    In this way it works like many compression schemes. Storing a small amount of data gets a worse compression ratio than a large amount, because in the larger amount there's more duplication that can be referenced.

    If there's anything "wasted" here, it's time, not brain cells. Brain cells seem to be infinitely capable of learning, but we know that a lifetime is viciously finite. Many digits of pi may improve your memorization skills to a certain extent, but clearly memorizing eighty thousand words is likely to help you more because words are more associable. Memorizing Shakespeare's plays provides a thousand apt quotes and analogies for all occasions, instead of just improving sequencing ability.

    That said, it's not like there aren't worse wastes of time that don't improve you at all.

  22. I want her.... by David+Horn · · Score: 2, Funny

    To do my backups!

    "OK, just remember this:
    1001011011000101001010101000111001010100101 0010111 10100111010101011101011010101110101010111001010010 10101010111010101010101001010010001011010100101001 01010101010101010101010101010110111001110100101010 01010101010001010101010101010101101010001010110101 00011001011011101100001110101010101010101000011101 0101012..."

    --
    PocketGamer.org - For the gamer on the go!
  23. 83,431th digits by angio · · Score: 5, Interesting

    The last digits, according to the pi searcher, are 315921943469. Now you too can recite them -- just make up a lot of numbers in the middle and hope the judges get bored!

  24. insight to brain operation? by mminbiole · · Score: 2, Interesting

    It seems like all that data would help decode how things are stored and recalled in the brain. 83 thousand numbers is orders of magnitude longer than that would be held by the average brain. Would someone's brain who stores a long string of patternless numbers exhibit a different structure? Would the amount of blood flow during recital be significantly different than someone recalling a 7 digit phone number?

  25. Anything beyond several decimal places is useless. by Anonymous Coward · · Score: 2, Interesting

    See quote below:

    "Conceive a sphere constructed with the earth at it center, and imagine it surface to pass through Sirius, which is 8.8 light years distant from the earth... Then imagine this enormous sphere to be so packed with microbes that in every cubic millimeter millions and millions of these diminutive animalcula are present. Now conceive these microbes to be unpacked and so distributed singly along a straight line that every two microbes are as far distant from each other as Sirius is from us... Conceive the long line thus fixed by all the microbes at the diameter of a circle, and imagine its circumference to be calculated by multiplying it diameter by Pi to 100 decimal places. Then, in the case of a circle of this enormous magnatude even, the circumference so calculated would not vary from the real circumference by a millionth part of a millimeter.

    This example will suffice to show that the calculation of Pi to 100 or 500 decimal places is wholly useless."

    - Hermann Schubart, A mathematics professor from Hamburg, Germany in 1889

    Source:
    http://www.asofyet.org/muppet/humor/uselesspi.html

  26. go Earth! by mag46 · · Score: 2, Funny

    the Pi-World-Ranking-List has the rules for participation and breaks down the ranking by world, continent, and country I'm just proud that, once again, an earthling holds the #1 spot. Good thing they let your search by world. Also, the martians are really slacking.

  27. Re:It's not a ratio ! by antispam_ben · · Score: 2, Funny

    Not only that, but it is transcendental.

    What's the resistance of a transcendental number?

    Ohmmmmmmmmmmmmmmmmmm.....

    --
    Tag lost or not installed.
  28. this is interesting. by KH · · Score: 5, Interesting

    I'm a Japanese. Once in my junior high days (7th grade for you 'mericans), I got so bored with the math class that I decided to memorize Pi on the textbook. It had something like 47 digits. It took no time and during that 45 minutes session, I memorized it. I still seem to remember it.

    Curiously, the Pi World Ranking List had meny Japanese and Indian names. This is sort of understandable. Both cultures used to emphasize on memorizing texts for a long long time. Up until my grandfather's generation, being educated meant being able to recite the whole Confucius, and some other assorted Chinese classics. In my schooldays, too, we were forced to memorize bunch of stuff that turned out to be useless (pi was not one of them though :). Coming up with a mnemonic is kinda part of culture. The way I used to memorize pi was to cut it at every four digits and try to associate some kind of logic with each chunk. For example, 3.14 1592 6535 8979 3238 4626 each of four digit groups seems to have some kind of pattern, except the first one, no?

    In India, too, traditional education for Brahmins started as memorizing the Veda transmitted to their family. There still are some people who can recite a whole Veda. Those people tended to memorize other stuff as well.

    Probably for the Japanese and Indians, memorizing some long strings that don't make sense is not that a strange thing.

    By the way, I am a Sanskritist, not a mathematician.

    1. Re:this is interesting. by javabandit · · Score: 2, Interesting

      I disagree.

      Memorizing PI is key to understanding what PI means. If you can't remember what PI is... how can you calculate the circumference of a circle?

      Memorization is the key to learning. How can you begin to understand P&S geometry without memorizing the theorems?

      Lets not forget that being able to REMEMBER (or memorize) what you have learned is necessary. Otherwise, you have to learn things over and over again.

      Like it or not, we are creatures of habit, pattern recognition, and memorization.

  29. A simple mnemonic for the first 15 by mangu · · Score: 2, Funny

    Memorize the sentence "how I want a drink, alcoholic of course, after the heavy chapters involving quantum mechanics". The digits of PI are the number of letters in each word. Of course, this may not help too much if you are into "Slashdot spelling"...

  30. In the Soviet Union... by Anonymous Coward · · Score: 3, Funny

    Pi memorizes YOU!

  31. this is amazing an all but... by tiberiandusk · · Score: 2, Insightful

    why aren't these guys using their brain for something important. my computer can calculate pi forever and much faster.

  32. MP3 by Jozer99 · · Score: 4, Funny

    Anyone have an MP3 of the event?

  33. Phi by (1+-sqrt(5))*(2**-1) · · Score: 2, Funny
    Links to world rankings for memorized digits of E and Sqrt(2) are also given.
    I feel slighted. ;(
  34. Got ears? this is how you do it by afinemetsfan · · Score: 2, Interesting

    The easy way to memorize a long number is to convert the digits into musical notes, its easier to memorize a song then a list of numbers. so 0 would be a C and 1 would be a D , ect. ect.

  35. Re:Japanese suffixes by Lovejoy · · Score: 3, Informative

    First of all, he's 59 years old.

    Second, you can call a little boy "mister" or preferably, "master."

    Third, calling someone "SoAndSo-san" while you're otherwise speaking English sounds really stupid to people who actually speak Japanese.

    Finally, you wouldn't use san for a little boy either. You'd call him kun or possibly , chan.

    /pedantry

  36. Re:Big E? by herc_mk2 · · Score: 2, Funny
    Could somebody tell me what Big E is? I've never heard of it. Now little e.. that's a different story

    IT'S THE BASE OF THE NATURAL LOGARITHM. LN(E) = 1.0

    SHEESH, WHAT DO THEY TEACH IN SCHOOLS THESE DAYS.

  37. Some Background by Kramer747 · · Score: 2, Informative

    From Mathworld at Wolfram Apparently Pi shows up in the bible twice. Weird.

    Also, wikipedia has a rather complete coverage of the topic. http://en.wikipedia.org/wiki/Pi

  38. Comment removed by account_deleted · · Score: 2, Informative

    Comment removed based on user account deletion

  39. In Base 10? piece of cake... er pie by hugesmile · · Score: 2, Funny

    I took the time to memorize pi to over 100,000 digits in base PI. When's that competition?

  40. What is this, suspense theater? by heinousjay · · Score: 2, Funny

    finish the fucking story, man.

    --
    Slashdot - where whining about luck is the new way to make the world you want.
  41. It's easy... by TheLittleJetson · · Score: 2, Funny

    How do you memorize a number that deep

    You only have to remember about 40 numbers and then they start repeating.