Talk:Primes whose sum of digits is 25: Difference between revisions
Talk:Primes whose sum of digits is 25 (view source)
Revision as of 12:35, 21 March 2021
, 3 years ago→The limit of primes that do not contain zeroes
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: I think it is possible to put an upper limit on primes whose digits sum to 25 and have no zeroes in them. The largest number with no internal zeros and a digit sum of 25 would be 1111111111111111111111111 (25 digits). --[[User:Tigerofdarkness|Tigerofdarkness]] ([[User talk:Tigerofdarkness|talk]]) 10:54, 21 March 2021 (UTC)
: Correct, stretch goal updated. If zeroes were allowed there would be an infinite number of them. It will need reasonably decent bignum handling and a fast prime number checker. I expect this is not really do-able in asm, C, etc. I would put a reasonable (soft) upper limit of say 30 mins on this and not be too critical of anything under that. --[[User:Petelomax|Pete Lomax]] ([[User talk:Petelomax|talk]]) 12:34, 21 March 2021 (UTC)
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