Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1271503Factored
FactorDigitsBitsDate
8702212605257970423424267437736982701738126.02022-11-25 17:35:11
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski20E0
Verified (Factored)Ray StroubleF9C7E6938D9B220E0
Verified (Factored)2002-09-14S57483F9C7E6938D9B220E832796
Verified (Factored)2016-06-01MadPooF9C7E6938D9B220E1016043
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-11-25Kevin_961123A9B3871CF44A57160775153
P-1 factors
DateFactorB1B2
2022-11-2587022126052579704234242674377369827017100000000512133342630
History
DateUserTypeResult
2022-11-27curtiscCERT
PRP Certification
Proof certified good
2022-11-25Kevin_9611C-PRP
M1271503/87022126052579704234242674377369827017 : 23A9B3871CF44A57
PRP proof power = 6
PRP: Verified
Proof certified good
2022-11-25Sid & AndyF-PM1
Factor: 87022126052579704234242674377369827017 / (P-1, B1=100000000, B2=512133342630)
2022-01-11onlinegameNF-PM1
B1=100000000, B2=200000000
2020-03-11Gordon SpenceNF
no factor from 2^67 to 2^68
2018-10-13JossNF-PM1
B1=1271503, B2=139865330, E=12
2018-09-12YxinityNF
no factor from 2^66 to 2^67
2018-05-03JossNF-PM1
B1=1271503, B2=127150300, E=12
2016-08-27Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-08-03Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-06-01MadPooC-LL
F9C7E6938D9B220E
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-24ramgeisNF
no factor from 2^65 to 2^66
2015-04-10monstNF
no factor from 2^64 to 2^65
2015-04-09omylistNF
no factor from 2^63 to 2^64
2013-10-01David CampeauNF-PM1
B1=1195000, B2=34655000, E=12
2012-10-18dbaughNF
no factor from 2^62 to 2^63
2012-09-14AxelssonNF
no factor from 2^61 to 2^62
2009-02-15Sturle SundeNF
no factor from 2^60 to 2^61