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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
3115999Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 271
TF target 264
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 8900000
B2 = 22840692420
ECM
DigitsB1Curves
2550000280 / 280
30250000101 / 640
Estimated T-Level: 25.8 ⓘ
LL
StatusDateUserResidueShift
Verified1998-04-21Chuck Kamas0974096E9EBC54F00
Bad1999-06-26Joe F Drennan1C31DC3544F5CAF2831795
Verified1999-09-14Steve Paltzer0974096E9EBC54F02740746
History
DateUserTypeResult
2025-07-24Architects CubedNF
no factor from 2^70 to 2^71
2023-03-01Sid & AndyNF-PM1
B1=8900000, B2=22840692420
2020-11-26axnNF
no factor from 2^69 to 2^70
2020-11-26axnNF
no factor from 2^68 to 2^69
2019-01-21TJAOINF
no factor from 2^67 to 2^68
2018-10-12mikrNF-PM1
B1=3000000, B2=100000000, E=12
2018-08-14JossNF-PM1
B1=420000, B2=4200000
2018-08-13JossNF-PM1
B1=420000, B2=3780000
2018-08-08JossNF-PM1
B1=420000, B2=1680000
2018-08-07JossNF-PM1
B1=420000, B2=1260000
2018-08-06JossNF-PM1
B1=420000, B2=840000
2017-04-14Gordon SpenceNF
no factor from 2^66 to 2^67
2016-04-14USAFSSNF-PM1
B1=210000, B2=6037500, E=12
2016-04-12JossNF-PM1
B1=196992, B2=6040345, E=6
2015-06-11ThaNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-03dbaughNF
no factor from 2^62 to 2^63
2011-08-31Squeeky_SquirrelNF-PM1
B1=95000, B2=1757500, E=6
2011-06-06Rob_DeeNF
no factor from 2^61 to 2^62
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=180000
2009-04-12S485122NF
no factor from 2^60 to 2^61