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
975054137Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
78004330971032.92008-05-31 23:57:30
42400134664699124711961.92015-12-28 07:24:39
History
DateUserTypeResult
2015-12-28ConductorF
Factor: 4240013466469912471 / TF: 1-65