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
55731289Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 273
P-1
B1 = 1000000
B2 = 24000000
LL
StatusDateUserResidueShift
Bad2012-09-17benthomasDE9BB5A206A1785241031185
Verified2020-03-29riccardo ubertiE9AFC1A25F63EAD176051
Verified2020-08-10slaurE9AFC1A25F63EAD12259710
History
DateUserTypeResult
2020-08-10slaurC-LL
E9AFC1A25F63EAD1
2020-03-29riccardo ubertiC-LL
E9AFC1A25F63EAD1
2020-02-27riccardo ubertiNF-PM1
B1=1000000, B2=24000000, E=12
2019-04-19ChuckNF
no factor from 2^73 to 2^74
2015-12-18Mark RoseNF
no factor from 2^72 to 2^73
2012-09-17benthomasC-LL
DE9BB5A206A17852
2012-06-24TheJudgerNF-PM1
B1=555000, B2=12071250, E=12
2012-06-13BdotNF
no factor from 2^71 to 2^72
2011-09-26GregNF
no factor from 2^70 to 2^71
2011-09-26GregNF
no factor from 2^69 to 2^70
2011-09-18mmmmmdonutsNF
no factor from 2^72 to 2^73
2011-04-09Wolfgang StegerNF
no factor from 2^68 to 2^69
2009-05-16Sturle SundeNF
no factor from 2^67 to 2^68
2009-01-08kutensNF
no factor from 2^66 to 2^67
2009-01-07kutensNF
no factor from 2^65 to 2^66
2009-01-06Sturle SundeNF
no factor from 2^64 to 2^65
2008-09-29-Anonymous-NF
no factor to 2^64