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
53440421Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 273
P-1
B1 = 645000
B2 = 19672500
LL
StatusDateUserResidueShift
Verified2012-06-18Dennis Okon9E870DC0452071231612514
Verified2020-09-08S4851229E870DC04520712327998026
History
DateUserTypeResult
2020-09-08S485122C-LL
9E870DC045207123
2020-09-05J. Gareth "Kit" MoretonNF
no factor from 2^74 to 2^75
2019-08-01lobsterfordinnerNF
no factor from 2^73 to 2^74
2016-01-28AirSquirrelsNF
no factor from 2^72 to 2^73
2012-06-18Dennis OkonC-LL
9E870DC045207123
2012-03-23megavinkNF
no factor from 2^71 to 2^72
2012-03-23megavinkNF
no factor from 2^70 to 2^71
2011-05-23megavinkNF
no factor from 2^69 to 2^70
2011-01-28IIRyskIINF
no factor from 2^68 to 2^69
2011-01-24KCNF-PM1
B1=645000, B2=19672500, E=12
2009-06-28SuperbobNF
no factor from 2^67 to 2^68
2009-02-26-Anonymous-NF
no factor from 2^66 to 2^67
2008-12-26WebiNF
no factor from 2^65 to 2^66
2008-12-26sabNF
no factor from 2^64 to 2^65
2008-06-16-Anonymous-NF
no factor to 2^64