Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4265903Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 265
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 6200000
B2 = 26528321820
ECM
DigitsB1Curves
2550000280 / 280
3025000070 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
Verified1998-08-24S.J. van Diest1BAF28CE85A04AD90
Verified2000-04-12Andrew Norton1BAF28CE85A04AD91654239
History
DateUserTypeResult
2024-11-17TheJudgerNF
no factor from 2^72 to 2^73
2024-11-17TheJudgerNF
no factor from 2^71 to 2^72
2022-06-01DRobinsonPENF-PM1
B1=6200000, B2=26528321820
2021-01-24-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-23-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-23-Anonymous-NF
no factor from 2^68 to 2^69
2018-11-15chuenkitNF
no factor from 2^67 to 2^68
2018-04-25chuenkitNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-01-28Squeeky_SquirrelNF-PM1
B1=150000, B2=3600000, E=6
2015-06-12snme2pm1NF
no factor from 2^65 to 2^66
2014-11-22JossNF-PM1
B1=80092
2014-08-11-Anonymous-NF-PM1
B1=65046
2014-01-01lycornNF
no factor from 2^64 to 2^65
2013-12-31JayderNF
no factor from 2^63 to 2^64
2012-01-31GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-08-23Squeeky_SquirrelNF-PM1
B1=50000, B2=762500, E=6
2011-01-04markrNF
no factor from 2^61 to 2^62
2009-08-07Carsten KossendeyNF-PM1
B1=25000, B2=337500