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
977828993Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
8507112239111239.62008-06-01 01:52:51
28548864952514865371961.32015-12-23 19:58:59
History
DateUserTypeResult
2015-12-23ConductorF
Factor: 2854886495251486537 / TF: 1-62