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
3198667Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 271
TF target 264
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10200000
B2 = 19598847450
ECM
DigitsB1Curves
2550000280 / 280
3025000062 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
Verified1998-02-08Al Lovrich2341E28A5D07A8C80
Verified1999-07-12Dave Hollinger2341E28A5D07A8C81066752
History
DateUserTypeResult
2025-07-11Architects CubedNF
no factor from 2^70 to 2^71
2023-04-05Sid & AndyNF-PM1
B1=10200000, B2=19598847450
2022-09-27TJAOINF
no factor from 2^69 to 2^70
2021-06-28TJAOINF
no factor from 2^68 to 2^69
2019-12-03mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-12-17TJAOINF
no factor from 2^67 to 2^68
2018-08-19JossNF-PM1
B1=430000, B2=4300000
2018-08-19JossNF-PM1
B1=430000, B2=3870000
2018-08-19JossNF-PM1
B1=430000, B2=3440000
2018-08-18JossNF-PM1
B1=430000, B2=3010000
2017-04-30Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-21ThaNF
no factor from 2^65 to 2^66
2015-02-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-15VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-05Squeeky_SquirrelNF-PM1
B1=215000, B2=6235000, E=12
2013-01-03dbaughNF
no factor from 2^62 to 2^63
2011-10-12Grant McCrackenNF
no factor from 2^61 to 2^62
2009-04-07S485122NF
no factor from 2^60 to 2^61