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
61391257Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 274
P-1
B1 = 570000
B2 = 14820000
LL
StatusDateUserResidueShift
Verified2013-09-11Matthew Neu6979EE643903979626887908
Verified2022-04-11James Cook6979EE643903979610808576
History
DateUserTypeResult
2022-04-11James CookC-LL
6979EE6439039796
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2013-09-11Matthew NeuC-LL
6979EE6439039796
2013-06-20owftheevilNF-PM1
B1=570000, B2=14820000, e=12
2013-06-17Jerry HallettNF
no factor from 2^73 to 2^74
2013-01-21Jerry HallettNF
no factor from 2^71 to 2^73
2013-01-20lycornNF
no factor from 2^70 to 2^71
2011-10-29josevpmsNF
no factor from 2^69 to 2^70
2009-09-27BranMuffinNF
no factor from 2^68 to 2^69
2009-09-21raymondfNF
no factor from 2^67 to 2^68
2009-07-19Johannes WeingartnerNF
no factor from 2^66 to 2^67
2009-04-08-Anonymous-NF
no factor from 2^65 to 2^66
2009-02-05Net_ForceNF
no factor from 2^64 to 2^65
2009-02-03Net_ForceNF
no factor from 2^63 to 2^64