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
1920403Factored
FactorDigitsBitsDate
2872679231841047284446712477.92020-08-03 04:03:37
ECM
DigitsB1Curves
2550000280 / 280
30250000108 / 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)Kevin JagetEE6C3542D01D55380
Verified (Factored)1999-01-17Matt BassettEE6C3542D01D55381859166
Verified (Factored)2015-07-06MadPooEE6C3542D01D5538486263
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-08-03M Miller16EFEC99A8D03C191118094453
Verified2020-08-04marssystems16EFEC99A8D03C191128585053
History
DateUserTypeResult
2020-08-04marssystemsC-PRP
M1920403/287267923184104728444671 : 16EFEC99A8D03C19
PRP: Verified
PRP without proof (not generated)
2020-08-03M MillerC-PRP
M1920403/287267923184104728444671 : 16EFEC99A8D03C19
PRP: Verified
PRP without proof (not generated)
2020-08-03GANF-ECM
Factor: 287267923184104728444671 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7900538613387784)
2019-04-28chuenkitNF
no factor from 2^67 to 2^68
2018-06-04TJAOINF
no factor from 2^66 to 2^67
2018-01-04mikrNF-PM1
B1=8000000, B2=320000000, E=12
2018-01-04JossNF-PM1
B1=2000000, B2=60000000, E=12
2017-12-18JossNF-PM1
B1=2000000, B2=20000000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-02ramgeisNF
no factor from 2^65 to 2^66
2015-07-06MadPooC-LL
EE6C3542D01D5538
2015-05-17snme2pm1NF
no factor from 2^64 to 2^65
2015-05-17snme2pm1NF
no factor from 2^63 to 2^64
2011-08-31kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2009-06-03Architects CubedNF
no factor from 2^60 to 2^61