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
7856467Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 267
P-1
B1 = 25000000
B2 = 64061901750
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
LL
StatusDateUserResidueShift
VerifiedPaul Victor Novarese6B2BAAE61D35B2A70
Verified1999-08-16Dr Michael Reber6B2BAAE61D35B2A74901670
History
DateUserTypeResult
2022-04-23Oliver KruseNF-PM1
B1=25000000, B2=64061901750
2022-04-09TheJudgerNF
no factor from 2^73 to 2^74
2022-04-09TheJudgerNF
no factor from 2^72 to 2^73
2021-09-30SRBaseNF
no factor from 2^71 to 2^72
2021-08-25SRBaseNF
no factor from 2^70 to 2^71
2021-08-21SRBaseNF
no factor from 2^69 to 2^70
2020-08-17storm5510NF-PM1
B1=375000, B2=8250000, E=6
2020-02-28TJAOINF
no factor from 2^68 to 2^69
2018-08-05ramgeisNF
no factor from 2^67 to 2^68
2016-08-28Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-09VictordeHollanderNF
no factor from 2^65 to 2^66
2013-10-11David CampeauNF
no factor from 2^64 to 2^65
2013-10-05NesowaNF
no factor from 2^63 to 2^64
2012-10-06NesowaNF-PM1
B1=100000, B2=1900000, E=6
2009-08-13Carsten KossendeyNF-PM1
B1=45000, B2=697500, E=6