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
42021817Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
6607813839169328547532169.22015-01-15 09:01:41
LL
StatusDateUserResidueShift
Verified (Factored)2008-11-20jhczF9C4A58057AA5B6D32302910
Verified (Factored)2009-10-08MCASD056A90F0BBDAFF932074188
History
DateUserTypeResult
2025-02-27James HeinrichF
Factor: 660781383916932854753 / TF: 69-72
2015-01-15chalsallF
Factor: 660781383916932854753 / TF: 69-70*
2014-03-02LaurVNF
no factor from 2^68 to 2^69
2009-10-08MCASC-LL
D056A90F0BBDAFF9
2008-11-20jhczC-LL
F9C4A58057AA5B6D