Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
280999643Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
2556775480030183662072167.82016-11-17 06:57:55
History
DateUserTypeResult
2016-11-17NickF
Factor: 255677548003018366207 / TF: 67-68
2016-01-20Nice MarmotNF
no factor from 2^66 to 2^67
2014-02-18ANONYMOUSNF
no factor from 2^65 to 2^66
2011-09-15sannerud.comNF
no factor from 2^64 to 2^65
2010-04-10RichardNF
no factor from 2^63 to 2^64
2010-04-10RichardNF
no factor from 2^62 to 2^63