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
11215907Factored
FactorDigitsBitsDate
931334958686143054698797980267496175137122.82021-12-27 11:17:37
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2000-11-25Richard BlaylockD45466B08C5C7531868154
Verified (Factored)2004-02-23hessenpower.deD45466B08C5C75315858431
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-12-29LaurV193E644FE7A4E8A61494444953
P-1 factors
DateFactorB1B2
2021-12-2793133495868614305469879798026749617516189107185673210
History
DateUserTypeResult
2021-12-29Ben DeloCERT
PRP Certification
Proof certified good
2021-12-29LaurVC-PRP
M11215907/9313349586861430546987979802674961751 : 193E644FE7A4E8A6
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-27LaurVF-PM1
Factor: 9313349586861430546987979802674961751 / (P-1, B1=6189107, B2=185673210)
2021-10-30SRBaseNF
no factor from 2^71 to 2^72
2021-08-14SRBaseNF
no factor from 2^70 to 2^71
2021-08-07SRBaseNF
no factor from 2^69 to 2^70
2017-12-27ramgeisNF
no factor from 2^68 to 2^69
2017-12-27ramgeisNF
no factor from 2^67 to 2^68
2015-12-28VictordeHollanderNF
no factor from 2^66 to 2^67
2015-05-07NesowaNF
no factor from 2^65 to 2^66
2015-02-01Sid & AndyNF-PM1
B1=130000, B2=2437500, E=6
2013-11-23lycornNF
no factor from 2^64 to 2^65