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
678721543Factored
FactorDigitsBitsDate
4217856677001943905532168.52018-05-24 21:07:04
History
DateUserTypeResult
2018-05-24ConductorF
Factor: 421785667700194390553 / TF: 68-69
2016-10-24ANONYMOUSNF
no factor from 2^67 to 2^68
2014-07-19sasakiNF
no factor from 2^66 to 2^67
2014-01-12sasakiNF
no factor from 2^65 to 2^66