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
856041983Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
28058220113735646235212271.22019-01-28 07:11:23
History
DateUserTypeResult
2025-03-28James HeinrichF
Factor: 2805822011373564623521 / TF: 71-72
2019-01-28Smok_bmv F
Factor: 2805822011373564623521 / TF: 71-72*
2019-01-28Smok_bmv NF
no factor from 2^70 to 2^71
2017-01-04ramgeisNF
no factor from 2^68 to 2^70
2015-09-11sasakiNF
no factor from 2^67 to 2^68
2015-02-26sasakiNF
no factor from 2^66 to 2^67
2012-04-08David CampeauNF
no factor from 2^64 to 2^66
2010-07-06lindedNF
no factor from 2^63 to 2^64