Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
47891707Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 272
P-1
B1 = 555000
B2 = 13181250
LL
StatusDateUserResidueShift
Bad2009-05-06Jacques X. Charles65C2C3CC0FB3FDDE18103991
Verified2009-12-17Steve Potocny13EA3B712F8112BB27406562
Verified2016-05-24MadPoo13EA3B712F8112BB30971654
History
DateUserTypeResult
2024-08-16tbusbyNF
no factor from 2^69 to 2^70
2019-09-14Jon PaceNF
no factor from 2^73 to 2^74
2018-02-11ktonyNF
no factor from 2^72 to 2^73
2016-05-24MadPooC-LL
13EA3B712F8112BB
2016-02-23Mark RoseNF
no factor from 2^1 to 2^63
2015-08-08GregNF
no factor from 2^71 to 2^72
2015-08-03GregNF
no factor from 2^70 to 2^71
2015-07-25Architects CubedNF
no factor from 2^69 to 2^70
2009-12-17Steve PotocnyC-LL
13EA3B712F8112BB
2009-05-06Jacques X. CharlesC-LL
65C2C3CC0FB3FDDE
2008-12-31Jacques X. CharlesNF-PM1
B1=555000, B2=13181250