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
53844971Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 273
P-1
B1 = 645000
B2 = 19350000
LL
StatusDateUserResidueShift
Verified2012-09-13Stephan Grupp637E12BF2289B1E736659275
Verified2020-07-01Tom Xue637E12BF2289B1E726428180
History
DateUserTypeResult
2020-07-01Tom XueC-LL
637E12BF2289B1E7
2019-08-31Mark RoseNF
no factor from 2^73 to 2^74
2016-02-06AirSquirrelsNF
no factor from 2^72 to 2^73
2012-09-13Stephan GruppC-LL
637E12BF2289B1E7
2012-01-19RichD0NF
no factor from 2^71 to 2^72
2011-09-08megavinkNF
no factor from 2^70 to 2^71
2011-05-16OS1NF
no factor from 2^69 to 2^70
2011-04-02CLICHENF
no factor from 2^68 to 2^69
2011-03-29NoPaNF-PM1
B1=645000, B2=19350000
2009-08-14Sturle SundeNF
no factor from 2^67 to 2^68
2008-12-23Sturle SundeNF
no factor from 2^66 to 2^67
2008-12-22Sturle SundeNF
no factor from 2^65 to 2^66
2008-12-21Sturle SundeNF
no factor from 2^64 to 2^65
2008-08-11-Anonymous-NF
no factor to 2^64