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
53581553Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 273
P-1
B1 = 635000
B2 = 18891250
LL
StatusDateUserResidueShift
Verified2012-04-02GnorfeD689551E25488F5136786229
Verified2020-06-27Sergey NosovD689551E25488F5135911635
History
DateUserTypeResult
2020-06-27Sergey NosovC-LL
D689551E25488F51
2019-02-04Sid & AndyNF
no factor from 2^74 to 2^75
2019-01-18Mark RoseNF
no factor from 2^73 to 2^74
2016-02-12AirSquirrelsNF
no factor from 2^72 to 2^73
2012-04-02GnorfeC-LL
D689551E25488F51
2012-02-28James HeinrichNF
no factor from 2^70 to 2^72
2011-06-04megavinkNF
no factor from 2^69 to 2^70
2011-01-05paulieNF
no factor from 2^68 to 2^69
2011-01-01oodairaNF-PM1
B1=635000, B2=18891250
2009-05-01TomNF
no factor from 2^67 to 2^68
2008-12-29NiklotNF
no factor from 2^66 to 2^67
2008-12-23NiklotNF
no factor from 2^65 to 2^66
2008-12-19Sturle SundeNF
no factor from 2^64 to 2^65
2008-08-18-Anonymous-NF
no factor to 2^64