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
661641977Factored
FactorDigitsBitsDate
5212159299675046815772168.82018-02-16 14:38:05
History
DateUserTypeResult
2018-02-16ConductorF
Factor: 521215929967504681577 / TF: 68-69
2017-02-01sasakiNF
no factor from 2^67 to 2^68
2014-04-04sasakiNF
no factor from 2^66 to 2^67
2013-12-18sasakiNF
no factor from 2^65 to 2^66
2012-01-23ALSNF
no factor from 2^64 to 2^65
2010-06-17Architects CubedNF
no factor from 2^63 to 2^64