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
5575369Factored
FactorDigitsBitsDate
27971064298903903889970362820830333107.82022-09-12 00:49:25
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-12-01Diana "Sue" Snyder048F39C62E8B005E3573404
Verified (Factored)2000-09-23Herb Savage048F39C62E8B005E2396020
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-09-17Perig0A49F2E97A0136A91214500353
P-1 factors
DateFactorB1B2
2022-09-1227971064298903903889970362820830350000006423588990
History
DateUserTypeResult
2022-09-17Jon PaceCERT
PRP Certification
Proof certified good
2022-09-17PerigC-PRP
M5575369/279710642989039038899703628208303 : 0A49F2E97A0136A9
PRP proof power = 7
PRP: Verified
Proof certified good
2022-09-12Sid & AndyF-PM1
Factor: 279710642989039038899703628208303 / (P-1, B1=5000000, B2=6423588990)
2021-10-11SRBaseNF
no factor from 2^71 to 2^72
2021-08-24SRBaseNF
no factor from 2^70 to 2^71
2021-08-18SRBaseNF
no factor from 2^69 to 2^70
2020-08-24TJAOINF
no factor from 2^68 to 2^69
2019-10-14USAFSSNF-PM1
B1=335000, B2=9966250, E=12
2018-07-05ramgeisNF
no factor from 2^67 to 2^68
2016-07-31Gordon SpenceNF
no factor from 2^66 to 2^67
2015-09-03snme2pm1NF
no factor from 2^65 to 2^66
2014-12-21monstNF
no factor from 2^64 to 2^65
2014-12-20NesowaNF
no factor from 2^63 to 2^64
2010-12-03Squeeky_SquirrelNF-PM1
B1=65000, B2=1023750, E=6
2009-06-06Carsten KossendeyNF-PM1
B1=30000, B2=390000
2009-02-10GrunwalderGIMPNF
no factor from 2^62 to 2^63