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
56117381Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 273
P-1
B1 = 590000
B2 = 12390000
LL
StatusDateUserResidueShift
Verified2013-07-10prime95BFC3BCD999C3FBF742133396
Verified2020-09-25Roland ClarksonBFC3BCD999C3FBF70
History
DateUserTypeResult
2020-09-25Roland ClarksonC-LL
BFC3BCD999C3FBF7
2018-09-26ktonyNF
no factor from 2^73 to 2^74
2016-02-23Mark RoseNF
no factor from 2^60 to 2^63
2015-12-28-Anonymous-NF
no factor from 2^72 to 2^73
2013-07-10prime95C-LL
BFC3BCD999C3FBF7
2012-06-22Jerry HallettNF
no factor from 2^71 to 2^72
2012-05-07Henk DeReeNF-PM1
B1=590000, B2=12390000
2011-06-10shaugeNF
no factor from 2^70 to 2^71
2011-06-10shaugeNF
no factor from 2^69 to 2^70
2011-04-22Dirk-HRONF
no factor from 2^68 to 2^69
2010-01-18bzmNF
no factor from 2^67 to 2^68
2008-07-03Sturle SundeNF
no factor from 2^66 to 2^67
2008-06-25Sturle SundeNF
no factor from 2^65 to 2^66
2008-06-24Sturle SundeNF
no factor from 2^64 to 2^65
2008-06-24Sturle SundeNF
no factor from 2^63 to 2^64