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
1984397Factored
FactorDigitsBitsDate
4317331034127274106806812478.52019-12-18 08:58:16
ECM
DigitsB1Curves
2550000280 / 280
3025000056 / 640
Estimated T-Level: 25.4
TF below 2^80 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Luke WelshEBA6A26DAB6481EB0
Verified (Factored)1999-01-02Nuutti KuosaEBA6A26DAB6481EB1246915
Verified (Factored)2015-07-10MadPooEBA6A26DAB6481EB574486
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2019-12-19mnd9E4A5A86365A4E2A41115568653
Verified2019-12-21Chang Chia-TcheE4A5A86365A4E2A41185488353
History
DateUserTypeResult
2019-12-21Chang Chia-TcheC-PRP
M1984397/431733103412727410680681 : E4A5A86365A4E2A4
PRP: Verified
PRP without proof (not generated)
2019-12-19mnd9C-PRP
M1984397/431733103412727410680681 : E4A5A86365A4E2A4
PRP: Verified
PRP without proof (not generated)
2019-12-18KeysarecoolF-ECM
Factor: 431733103412727410680681 / (ECM curve 1, B1=50000, B2=5000000, Sigma=4544571431034378)
2019-05-18chuenkitNF
no factor from 2^67 to 2^68
2018-11-26JossNF-PM1
B1=1984397, B2=248049625, E=12
2018-05-21JossNF-PM1
B1=1984397, B2=198439700, E=12
2018-03-11JossNF-PM1
B1=1984397, B2=120000000, E=12
2018-02-15JossNF-PM1
B1=1984397, B2=60000000, E=12
2018-01-22JossNF-PM1
B1=1984397, B2=30000000, E=12
2018-01-21JossNF-PM1
B1=1205760
2017-12-25TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-11ramgeisNF
no factor from 2^65 to 2^66
2015-07-10MadPooC-LL
EBA6A26DAB6481EB
2015-03-12lycornNF
no factor from 2^64 to 2^65
2015-03-12lycornNF
no factor from 2^63 to 2^64
2011-07-01GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-01-23kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2009-12-16S485122NF
no factor from 2^60 to 2^61