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
857168083Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
39168862161651334140232271.72025-03-28 03:01:13
42399651880533009016732271.82019-01-29 12:28:21
History
DateUserTypeResult
2025-03-28James HeinrichF
Factors: 4239965188053300901673,3916886216165133414023 / TF: 71-72
2019-01-29Smok_bmv F
Factor: 4239965188053300901673 / TF: 71-72*
2019-01-29Smok_bmv NF
no factor from 2^70 to 2^71
2016-11-06ramgeisNF
no factor from 2^68 to 2^70
2015-09-02sasakiNF
no factor from 2^67 to 2^68
2015-03-01sasakiNF
no factor from 2^66 to 2^67
2012-04-08Le ComteNF
no factor from 2^65 to 2^66
2012-04-08Le ComteNF
no factor from 2^64 to 2^65
2010-08-02lindedNF
no factor from 2^63 to 2^64