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
687996941Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
3874224426912075224812168.42018-07-06 20:23:38
History
DateUserTypeResult
2018-07-06ConductorF
Factor: 387422442691207522481 / TF: 68-69
2016-11-05NoPolarBearsHereNF
no factor from 2^67 to 2^68
2014-08-16sasakiNF
no factor from 2^66 to 2^67
2014-02-24america64NF
no factor from 2^65 to 2^66