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
4457603Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 265
P-1
B1 = 7500000
B2 = 12441625350
ECM
DigitsB1Curves
2550000103 / 280
Estimated T-Level: 21.8 ⓘ
LL
StatusDateUserResidueShift
Verified1998-08-30Bruce Loving98DF6CC561B14E8B0
Verified1999-11-24James Struble98DF6CC561B14E8B3493947
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2025-07-19Luis Fernando S Silvafactor ECM small0.00 % 2025-07-19
History
DateUserTypeResult
2024-11-17TheJudgerNF
no factor from 2^72 to 2^73
2024-11-17TheJudgerNF
no factor from 2^71 to 2^72
2022-08-16xssNF-PM1
B1=7500000, B2=12441625350
2021-08-22SRBaseNF
no factor from 2^70 to 2^71
2021-08-18SRBaseNF
no factor from 2^69 to 2^70
2021-07-21MadPooNF
no factor from 2^68 to 2^69
2021-04-24Architects CubedNF-PM1
B1=222000, B2=13843000
2018-06-24ramgeisNF
no factor from 2^67 to 2^68
2018-06-24ramgeisNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-24snme2pm1NF
no factor from 2^65 to 2^66
2014-09-17monstNF
no factor from 2^64 to 2^65
2014-09-17JayderNF
no factor from 2^63 to 2^64
2012-10-10Squeeky_SquirrelNF-PM1
B1=290000, B2=7467500, E=12
2012-02-03GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-10-13markrNF
no factor from 2^61 to 2^62
2009-07-21Carsten KossendeyNF-PM1
B1=25000, B2=362500