Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
155085731Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
21221710571423815360792270.82017-08-28 22:41:16
History
DateUserTypeResult
2017-08-28Sergey NosovF
Factor: 2122171057142381536079 / TF: 70-72*
2017-08-06La GüiraNF
no factor from 2^69 to 2^70
2017-03-03BrionHNF
no factor from 2^68 to 2^69
2016-05-02SummyNF
no factor from 2^67 to 2^68
2015-04-10nEtcoOKNF
no factor from 2^66 to 2^67
2013-02-03firereddNF
no factor from 2^65 to 2^66
2011-01-22runeskNF
no factor from 2^64 to 2^65
2010-06-26Torchwood InstituteNF
no factor from 2^63 to 2^64