Recently, I've been concerned with the fact that I don't know many large primes. Why? I don't know. This has led to a search for easy to remember prime numbers. I've found a few goods ones, namely
- 867-5309 - Jenny's number
- the digit 1 - 1031 times, in the style of the picture to above, and the largest known repunit prime
- 1987 (my birth year), 2011 (last year), 1999 (the party year)
But then I remembered that I already know 50 digits of pi, memorized one boring day in grade school, so this got me wondering whether there were any primes among the digits of pi
Lo an behold, I wrote a little script, and found a few:
Found one, with 1 digits, is: 3
Found one, with 2 digits, is: 31
Found one, with 6 digits, is: 314159
Found a rounded one with 12 digits, is: 314159265359
Found one, with 38 digits, is: 31415926535897932384626433832795028841
I think it's usual for most science geeks to know pi to at least 3.14159, if you're one of those people, now you know a 6 digit prime! for free!
Did you say that the picture in the top left has the digit 1 - 1,030 times? Because I believe it is not even half of that. It is closer to 419.
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