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
61196101Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 274
P-1
B1 = 580000
B2 = 11745000
LL
StatusDateUserResidueShift
Verified2014-08-19kawarin888FF89A396CBB5245712322
Verified2022-03-27Sergey Nosov888FF89A396CBB5248042774
History
DateUserTypeResult
2022-03-27Sergey NosovC-LL
888FF89A396CBB52
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2014-08-19kawarinC-LL
888FF89A396CBB52
2014-07-06Craig MeyersNF
no factor from 2^73 to 2^74
2013-04-19BdotNF-PM1
B1=580000, B2=11745000, E=6
2013-01-27BdotNF
no factor from 2^72 to 2^73
2013-01-27BdotNF
no factor from 2^71 to 2^72
2013-01-26BdotNF
no factor from 2^70 to 2^71
2011-10-29GrunwalderGIMPNF
no factor from 2^69 to 2^70
2009-08-14Larry LogoryNF
no factor from 2^68 to 2^69
2009-08-01Misha ONF
no factor from 2^67 to 2^68
2009-07-28-Anonymous-NF
no factor from 2^66 to 2^67
2009-07-25MyxozoaNF
no factor from 2^65 to 2^66
2009-04-15borgygNF
no factor from 2^64 to 2^65
2009-01-31Son JohanNF
no factor from 2^63 to 2^64