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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Exponent Range:










MnStatusDetails
5286863Factored
FactorDigitsBitsDate
49047705660366942152504045208178197059339128.52021-10-14 01:52:52
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)1998-09-20Chris ProctorF9ED71231DC474CA0
Verified (Factored)2000-07-12Lynn A. RothF9ED71231DC474CA5205802
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-10-20Sébastien BROUCKE4DDA5F25ADADF4A7117651053
Verified2021-10-22LaurV4DDA5F25ADADF4A71130773053
P-1 factors
DateFactorB1B2
2021-10-144904770566036694215250404520817819705938000000400000000
History
DateUserTypeResult
2021-10-22curtiscCERT
PRP Certification
Proof certified good
2021-10-22LaurVC-PRP
M5286863/490477056603669421525040452081781970593 : 4DDA5F25ADADF4A7
PRP proof power = 7
PRP: Verified
Proof certified good
2021-10-20Sébastien BROUCKEC-PRP
M5286863/490477056603669421525040452081781970593 : 4DDA5F25ADADF4A7
PRP: Verified
PRP without proof (not generated)
2021-10-14axnF-PM1
Factor: 490477056603669421525040452081781970593 / (P-1, B1=8000000, B2=400000000)
2021-09-16SRBaseNF
no factor from 2^71 to 2^72
2021-08-23SRBaseNF
no factor from 2^70 to 2^71
2021-08-18SRBaseNF
no factor from 2^69 to 2^70
2020-10-05TJAOINF
no factor from 2^68 to 2^69
2019-07-03USAFSSNF-PM1
B1=315000, B2=9371250, E=12
2018-06-17ramgeisNF
no factor from 2^67 to 2^68
2016-06-07Gordon SpenceNF
no factor from 2^66 to 2^67
2015-08-14snme2pm1NF
no factor from 2^65 to 2^66
2014-12-22VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-22VictordeHollanderNF
no factor from 2^63 to 2^64
2010-07-23Squeeky_SquirrelNF-PM1
B1=60000, B2=975000, E=6
2009-08-21Carsten KossendeyNF-PM1
B1=25000, B2=343750
2009-06-04GrunwalderGIMPNF
no factor from 2^62 to 2^63