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
9691861Factored
FactorDigitsBitsDate
792001964950333917653126712686.02018-10-24 13:06:47
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad2000-04-12Northwestern College1986E920BE57BB2F7057571
Verified (Factored)2001-08-24Tom Womack4891C2DF864A52757886045
Verified (Factored)2003-08-31Aaron Zod4891C2DF864A52752503463
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-10-13Niels_Mache_NextcloudC35E3D8305D7F1A51520084053
Verified2020-12-23Oliver KruseC35E3D8305D7F1A51817299453
P-1 factors
DateFactorB1B2
2018-10-247920019649503339176531267155500017482500
History
DateUserTypeResult
2020-12-23Chun sung sooCERT
PRP Certification
Proof certified good
2020-12-23Oliver KruseC-PRP
M9691861/79200196495033391765312671 : C35E3D8305D7F1A5
PRP proof power = 8
PRP: Verified
Proof certified good
2019-10-13Niels_Mache_NextcloudC-PRP
M9691861/79200196495033391765312671 : C35E3D8305D7F1A5
PRP: Verified
PRP without proof (not generated)
2018-10-24Squeeky_SquirrelF-PM1
Factor: 79200196495033391765312671 / (P-1, B1=555000, B2=17482500, E=12)
2016-10-10snme2pm1NF
no factor from 2^67 to 2^68
2016-10-10snme2pm1NF
no factor from 2^66 to 2^67
2015-05-02VictordeHollanderNF
no factor from 2^65 to 2^66
2013-08-28NesowaNF
no factor from 2^64 to 2^65