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
9902587Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 268
P-1
B1 = 2000000
B2 = 4219343700
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
LL
StatusDateUserResidueShift
Verified2000-05-17Frans Lategan251E6556704EE64A2317455
Verified2003-08-08Ars Technica Team Prime Rib251E6556704EE64A3813287
History
DateUserTypeResult
2022-05-07ThaNF-PM1
B1=2000000, B2=4219343700
2021-10-21SRBaseNF
no factor from 2^71 to 2^72
2021-08-11SRBaseNF
no factor from 2^70 to 2^71
2020-11-01chuenkitNF
no factor from 2^69 to 2^70
2019-08-23TJAOINF
no factor from 2^68 to 2^69
2019-01-05USAFSSNF-PM1
B1=570000, B2=17955000, E=12
2017-05-09snme2pm1NF
no factor from 2^67 to 2^68
2015-10-21mikrNF
no factor from 2^66 to 2^67
2015-04-21VictordeHollanderNF
no factor from 2^65 to 2^66
2013-08-22NesowaNF
no factor from 2^64 to 2^65
2013-04-03NesowaNF-PM1
B1=120000, B2=2370000, E=6