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
8101801Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 267
P-1
B1 = 16800000
B2 = 104092471560
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
LL
StatusDateUserResidueShift
Verified1999-12-23Dale Dietich5838FCC57DACE12A8062084
Verified2003-02-24Dick Miller5838FCC57DACE12A7285781
History
DateUserTypeResult
2025-10-06yuriy_5-1NF-PM1
B1=16800000, B2=104092471560
2022-04-19FlaukrotistNF-PM1
B1=1500000, B2=800837730
2022-02-13FlaukrotistNF
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
2019-11-20mnd9NF
no factor from 2^68 to 2^69
2018-07-03chuenkitNF
no factor from 2^67 to 2^68
2015-11-26snme2pm1NF
no factor from 2^66 to 2^67
2015-04-20snme2pm1NF
no factor from 2^65 to 2^66
2013-09-01David CampeauNF
no factor from 2^64 to 2^65
2012-07-18AxelssonNF
no factor from 2^63 to 2^64
2012-02-11Carsten KossendeyNF-PM1
B1=505000, B2=16286250, E=6