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
42197861TF
No factors below 273
TF target 272
P-1
B1 = 495000
B2 = 12127500
LL
StatusDateUserResidueShift
Verified2008-09-16Stephen GruppB55967A06A89CA8B883504
Verified2017-10-06Sergey NosovB55967A06A89CA8B5509161
History
DateUserTypeResult
2022-04-28RichD0NF
no factor from 2^72 to 2^73
2017-10-06Sergey NosovC-LL
B55967A06A89CA8B
2015-10-02AirSquirrelsNF
no factor from 2^71 to 2^72
2015-03-17David CampeauNF
no factor from 2^70 to 2^71
2015-01-19Mark RoseNF
no factor from 2^69 to 2^70
2014-01-04Torben K.NF
no factor from 2^68 to 2^69