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
2595961Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 263
TF below 2^74 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 10050107760
ECM
DigitsB1Curves
2550000215 / 280
Estimated T-Level: 23.8 ⓘ
LL
StatusDateUserResidueShift
VerifiedMark E. Deardorff6827FFF3A0EFC6A70
VerifiedCornelius Caesar6827FFF3A0EFC6A70
Verified1998-02-12Robert R. Fenichel6827FFF3A0EFC6A70
Verified2015-11-14MadPoo6827FFF3A0EFC6A71514802
History
DateUserTypeResult
2025-04-23JossNF-PM1
B1=10000000, B2=10050107760
2024-03-29TJAOINF
no factor from 2^69 to 2^70
2023-02-06Architects CubedNF-PM1
B1=5000000, B2=8646469650
2021-05-27TJAOINF
no factor from 2^68 to 2^69
2019-04-01TJAOINF
no factor from 2^67 to 2^68
2018-11-27mikrNF-PM1
B1=3000000, B2=135000000, E=12
2018-07-08JossNF-PM1
B1=600000, B2=6000000, E=6
2017-08-21Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-14MadPooC-LL
6827FFF3A0EFC6A7
2015-11-06ramgeisNF
no factor from 2^65 to 2^66
2015-02-27VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-27VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-23Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-02-25James HeinrichNF-PM1
B1=300000, B2=8000000, E=12
2011-01-15JossNF-PM1
B1=50000
2010-11-16JossNF-PM1
B1=20000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61