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
8258143Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 268
P-1
B1 = 3000000
B2 = 4420962000
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
LL
StatusDateUserResidueShift
Verified2000-02-01David B. Ritchie47C8D4F2F32376B51298113
Verified2002-08-24Ars Technica Team Prime Rib47C8D4F2F32376B55115103
History
DateUserTypeResult
2022-11-05linamentNF-PM1
B1=3000000, B2=4420962000
2022-11-04linamentNF-PM1
B1=2999900
2021-10-15SRBaseNF
no factor from 2^71 to 2^72
2021-08-31SRBaseNF
no factor from 2^70 to 2^71
2021-08-20SRBaseNF
no factor from 2^69 to 2^70
2019-12-13USAFSSNF-PM1
B1=470000, B2=13982500, E=12
2019-12-01mnd9NF
no factor from 2^68 to 2^69
2017-12-25monstNF
no factor from 2^67 to 2^68
2015-12-16snme2pm1NF
no factor from 2^66 to 2^67
2015-05-29VictordeHollanderNF
no factor from 2^65 to 2^66
2013-12-30David CampeauNF
no factor from 2^64 to 2^65
2012-11-27NesowaNF-PM1
B1=95000, B2=1662500, E=6