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
39720503Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 272
P-1
B1 = 555000
B2 = 11516250
LL
StatusDateUserResidueShift
Bad2008-10-26-Anonymous-857157EB0F07CFDA2856119
Verified2015-07-30joe b.5C580292A7C0201023878387
Bad2015-10-26demfloroC4F54D84838ACF863395998
Verified2016-01-13ee33t15C580292A7C0201012340023
History
DateUserTypeResult
2024-05-21James HeinrichNF
no factor from 2^68 to 2^69
2019-10-11-Anonymous-NF
no factor from 2^72 to 2^73
2019-08-03Architects CubedNF-PM1
B1=555000, B2=11516250, E=12
2019-07-18monstNF
no factor from 2^71 to 2^72
2016-01-13ee33t1C-LL
5C580292A7C02010
2015-10-26demfloroC-LL
C4F54D84838ACF86
2015-07-30joe b.C-LL
5C580292A7C02010
2014-12-15ChuckNF
no factor from 2^70 to 2^71
2014-12-12VictordeHollanderNF
no factor from 2^69 to 2^70
2012-10-06Carsten KossendeyNF
no factor from 2^68 to 2^69
2008-10-26-Anonymous-C-LL
857157EB0F07CFDA