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Magic π (mander.xyz)
submitted 2 years ago by to c/science_memes@mander.xyz
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[–] 14 points 2 years ago (3 children)

There's a 9 repeating 6 times in there which I'd think is a pretty rare occurrence in pi. I wonder what the longest occurrence of a repeating digit is.

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  • [–] 23 points 2 years ago* (1 child)

    Pi is infinite so every combination/string of numbers is in there, if we calculated enough you could find a billion 2s next to each other

    You can look through the first trillion here

    https://archive.org/details/pi_dec_1t

    Though it’s a bunch of downloading

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  • [–] 15 points 2 years ago (2 children)

    Not necessarily. It could just become a series of 1's repeating forever. Nothing would require it to contain all strings of numbers.

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  • [–] 2 points 2 years ago (2 children)

    The point of pi is that it’s non-repeating

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  • [–] 26 points 2 years ago (1 child)

    Take a look at 0.101001000100001... This number is also non-repeating, but obviously doesn't contain all numbers with finite digits.

    The property you're looking for is called to be a normal number. Pi is assumed to be one, but it hasn't yet been proven.

    However, in a sense this is an unremarkable property as almost all real numbers are normal. :)

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  • [–] 4 points 2 years ago* (1 child)

    At work at the moment so can't go deep into it. But I think you misunderstand what non repeating numbers mean. Of course there are repeating numbers within pi which is fine, the issue would be if ALL the digits were to simply cycle over and repeat themselves. If however there are a few trillion digits then a series of 1's and 0's for ever, pi is still non repeating

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  • [–] -1 points 2 years ago (1 child)

    Did you read what I responded to?

    It could just become a series of 1’s repeating forever.

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  • [–] 4 points 2 years ago (1 child)

    I did read it, I also wrote it. Wasn't trying to put you down or anything just sharing a bit of knowledge I found interesting. I know many people (my self included at one point) assumed pi would have to include everything when that just isn't true. Apologies if I did a bad job explaining it though

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  • [–] 10 points 2 years ago (1 child)

    Looked it up, and it's apparently called the Feynman point after Physicist Richard Feynman (though the story behind that attribution is disputed). https://en.wikipedia.org/wiki/Six_nines_in_pi?wprov=sfla1

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  • [–] 1 point 2 years ago

    That's fascinating. Obviously, there's a series of repeating numbers in there, and one of the numbers would have a highest number of repeats... until further places of pi are determined and another number knocks it off... I assume there's a repeating 1, or 2 that repeats 7 or 8 times,etc... at some point...

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  • [–] 4 points 2 years ago (1 child)

    On a long enough string I'm guessing... Infinite? Pi isn't a pattern so does it follow the same "if monkeys hade an infinite amount of time to type at a typewriter they'd type Shakespeare"

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  • [–] 1 point 2 years ago

    Well I thought that at first, but it has to be less than infinite since other numbers have to repeat in there as well with at least some occurrence so it's infinite minus something, but since pi goes on infinitely, it's obviously some high number...

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