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
8245667Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 267
P-1
B1 = 1600000
B2 = 7363257720
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
LL
StatusDateUserResidueShift
Verified2002-03-31Michael WillF5B40410D61857DA6981909
Verified2003-01-25Robin StevensF5B40410D61857DA2295574
History
DateUserTypeResult
2022-02-08axnNF-PM1
B1=1600000, B2=7363257720
2021-10-10SRBaseNF
no factor from 2^71 to 2^72
2021-08-26SRBaseNF
no factor from 2^70 to 2^71
2021-08-20SRBaseNF
no factor from 2^69 to 2^70
2020-02-01USAFSSNF-PM1
B1=475000, B2=15318750, E=12
2020-01-10TJAOINF
no factor from 2^68 to 2^69
2018-07-16chuenkitNF
no factor from 2^67 to 2^68
2015-12-15snme2pm1NF
no factor from 2^66 to 2^67
2015-06-03VictordeHollanderNF
no factor from 2^65 to 2^66
2013-12-29David CampeauNF
no factor from 2^64 to 2^65
2012-11-20NesowaNF-PM1
B1=95000, B2=1638750, E=6
2011-07-26Carsten KossendeyNF
no factor from 2^63 to 2^64