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
678399493Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1961715467742862872732167.42016-12-12 09:22:55
History
DateUserTypeResult
2016-12-12fraltF
Factor: 196171546774286287273 / TF: 67-68
2014-07-23sasakiNF
no factor from 2^66 to 2^67
2014-01-11sasakiNF
no factor from 2^65 to 2^66
2012-01-27HardyP GermanyNF
no factor from 2^64 to 2^65