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
977218993Composite: 4 known prime factors
Factored
FactorDigitsBitsDate
61271630861111342.52008-06-01 01:29:21
281863808447117531754.62014-12-05 12:33:29
620961046621801431755.82015-02-14 11:19:37
31649188926888478631961.52015-12-23 16:12:53
History
DateUserTypeResult
2023-05-28mikrNF
no factor from 2^67 to 2^73
2015-12-23ConductorF
Factor: 3164918892688847863 / TF: 1-62
2015-02-14TJAOIF
Factor: 62096104662180143 / TF: 55-56
2014-12-05TJAOIF
Factor: 28186380844711753 / TF: 54-55