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
42042907Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 272
P-1
B1 = 485000
B2 = 13095000
LL
StatusDateUserResidueShift
Verified2008-03-22Bryan Bunker66869230B84E434B27812111
Verified2017-09-17Sergey Nosov66869230B84E434B5535759
History
DateUserTypeResult
2020-04-10Random GPUsNF
no factor from 2^72 to 2^73
2017-09-17Sergey NosovC-LL
66869230B84E434B
2015-08-26-Anonymous-NF
no factor from 2^71 to 2^72
2015-02-27Mark RoseNF
no factor from 2^70 to 2^71
2015-01-15Mark RoseNF
no factor from 2^69 to 2^70