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
816205183Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
19876823966140349566732270.82019-01-11 11:59:49
History
DateUserTypeResult
2025-03-28James HeinrichF
Factor: 1987682396614034956673 / TF: 70-71
2019-01-11Smok_bmv F
Factor: 1987682396614034956673 / TF: 70-71*
2016-11-20ramgeisNF
no factor from 2^68 to 2^70
2015-06-22sasakiNF
no factor from 2^67 to 2^68
2014-12-27sasakiNF
no factor from 2^66 to 2^67
2012-02-29oodairaNF
no factor from 2^65 to 2^66
2012-02-29oodairaNF
no factor from 2^64 to 2^65
2010-07-15Architects CubedNF
no factor from 2^63 to 2^64