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
42047569Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 272
P-1
B1 = 410000
B2 = 2152500
LL
StatusDateUserResidueShift
Verified2008-05-10C. Cooper / S. BooneC5AF7779D369D58139635707
Verified2017-12-01GrunwalderGIMPC5AF7779D369D58137378756
History
DateUserTypeResult
2020-04-26Random GPUsNF
no factor from 2^72 to 2^73
2017-12-01GrunwalderGIMPC-LL
C5AF7779D369D581
2015-08-26-Anonymous-NF
no factor from 2^71 to 2^72
2015-02-26Mark RoseNF
no factor from 2^70 to 2^71
2015-01-17chalsallNF
no factor from 2^69 to 2^70
2014-03-03LaurVNF
no factor from 2^68 to 2^69