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
8041399Factored
FactorDigitsBitsDate
4558166671678015443936412478.62020-11-08 22:10:38
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-09-22John Milton13AF1A32FA8C8B0F4920864
Verified (Factored)2002-07-27Ars Technica Team Prime Rib13AF1A32FA8C8B0F7493439
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-11-09mrh043FC0F29143278A1452798453
P-1 factors
DateFactorB1B2
2020-11-0845581666716780154439364150000015000000
History
DateUserTypeResult
2020-11-09Ben DeloCERT
PRP Certification
Proof certified good
2020-11-09mrhC-PRP
M8041399/455816667167801544393641 : 043FC0F29143278A
PRP proof power = 8
PRP: Verified
Proof certified good
2020-11-08Dylan DelgadoF-PM1
Factor: 455816667167801544393641 / (P-1, B1=500000, B2=15000000, e=12, n=448K CUDAPm1 v0.22)
2020-01-31TJAOINF
no factor from 2^68 to 2^69
2017-09-11Sid & AndyNF
no factor from 2^67 to 2^68
2015-11-19snme2pm1NF
no factor from 2^66 to 2^67
2015-04-24snme2pm1NF
no factor from 2^65 to 2^66
2013-12-24David CampeauNF
no factor from 2^64 to 2^65
2013-08-25David CampeauNF
no factor from 2^63 to 2^64
2012-09-21NesowaNF-PM1
B1=100000, B2=1950000, E=6