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
671961557Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
4954311626125740466332168.72018-04-03 20:53:12
History
DateUserTypeResult
2018-04-03ConductorF
Factor: 495431162612574046633 / TF: 68-69
2017-01-12NoPolarBearsHereNF
no factor from 2^67 to 2^68
2014-07-07sasakiNF
no factor from 2^66 to 2^67
2013-04-21ramgeisNF
no factor from 2^65 to 2^66