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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4096531Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
TF below 2^73 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 6200000
B2 = 33075839160
ECM
DigitsB1Curves
2550000193 / 280
Estimated T-Level: 23.4 ⓘ
LL
StatusDateUserResidueShift
VerifiedAndrew ChurchillEF1C7F4205C013080
Verified1999-10-29Timothy GarnettEF1C7F4205C013081150384
History
DateUserTypeResult
2025-02-17linamentNF
no factor from 2^71 to 2^72
2022-11-14DRobinsonPENF-PM1
B1=6200000, B2=33075839160
2022-04-19mikrNF
no factor from 2^70 to 2^71
2021-11-30mikrNF
no factor from 2^69 to 2^70
2021-08-17ATHNF-PP1
Start=2/7, B1=2500000, B2=182500000
2021-07-08TJAOINF
no factor from 2^68 to 2^69
2020-10-10ViliamFNF-PM1
B1=5000000, B2=150000000
2018-11-09YxinityNF
no factor from 2^67 to 2^68
2016-10-15kkmrkkblmbrbkNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-05-24snme2pm1NF
no factor from 2^65 to 2^66
2013-10-28David CampeauNF
no factor from 2^64 to 2^65
2013-09-01JayderNF
no factor from 2^63 to 2^64
2013-07-28Squeeky_SquirrelNF-PM1
B1=125000, B2=2343750, E=6
2011-07-02USAFSSNF-PM1
B1=40000, B2=580000
2011-05-28GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-11-17Grant McCrackenNF
no factor from 2^61 to 2^62
2009-07-22Carsten KossendeyNF-PM1
B1=20000, B2=300000