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
8556277Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 268
P-1
B1 = 1560000
B2 = 551166330
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
LL
StatusDateUserResidueShift
Verified1999-11-24Doug Crowder1C5E7E02E465B46D6128873
Verified2002-11-02Ars Technica Team Prime Rib1C5E7E02E465B46D538748
History
DateUserTypeResult
2022-01-05firejugglerNF-PM1
B1=1560000, B2=551166330
2021-10-05SRBaseNF
no factor from 2^71 to 2^72
2021-08-27SRBaseNF
no factor from 2^70 to 2^71
2021-08-20SRBaseNF
no factor from 2^69 to 2^70
2020-01-03TJAOINF
no factor from 2^68 to 2^69
2018-04-04monstNF
no factor from 2^67 to 2^68
2016-01-25snme2pm1NF
no factor from 2^66 to 2^67
2015-05-25VictordeHollanderNF
no factor from 2^65 to 2^66
2014-01-28lycornNF
no factor from 2^64 to 2^65
2012-04-30bcp19NF-PM1
B1=100000, B2=1825000, E=6