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
12001523Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 268
P-1
B1 = 10000000
B2 = 58281926430
ECM
DigitsB1Curves
25500008 / 280
Estimated T-Level: 20.1 ⓘ
LL
StatusDateUserResidueShift
VerifiedKen Kriesel16B25ED5D40953E610887654
Verified2004-07-26Michael Nüsken16B25ED5D40953E611202960
History
DateUserTypeResult
2025-07-11mikrNF-PM1
B1=10000000, B2=58281926430
2024-11-16TheJudgerNF
no factor from 2^72 to 2^73
2021-12-09lycornNF-PM1
B1=1300000, B2=500631810
2021-10-26-Anonymous-NF
no factor from 2^71 to 2^72
2020-11-29mikrNF
no factor from 2^70 to 2^71
2017-10-01YxinityNF
no factor from 2^69 to 2^70
2017-09-10mikrNF
no factor from 2^68 to 2^69
2015-02-03ThaNF
no factor from 2^67 to 2^68
2011-09-04GrunwalderGIMPNF-PM1
B1=500000, B2=10000000, E=6
2011-08-25GrunwalderGIMPNF
no factor from 2^66 to 2^67
2011-08-25GrunwalderGIMPNF
no factor from 2^65 to 2^66
2011-08-25GrunwalderGIMPNF
no factor from 2^64 to 2^65