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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."

27 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.

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    1. 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?

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    2. 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.

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

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

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

      No. They reiterate a formula in their head.

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

    5. 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!!!!

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  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. 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)

  6. 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.

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  7. 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.

  8. 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.
  9. 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.
  10. 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.

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    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
  11. 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.

  12. 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
  13. Re:People by MyLongNickName · · Score: 5, Funny

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

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  14. Re:People by Ceirren · · Score: 5, Funny

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

  15. 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...

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  16. 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!

  17. 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.

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

    Anyone have an MP3 of the event?