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
48068831Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 272
P-1
B1 = 460000
B2 = 8970000
LL
StatusDateUserResidueShift
Verified2012-06-26rick05376D5348B11B0B43534116
Verified2019-04-03Brian Heywood05376D5348B11B0B8472491
History
DateUserTypeResult
2019-04-03Brian HeywoodC-LL
05376D5348B11B0B
2017-12-11monstNF
no factor from 2^72 to 2^73
2012-06-26rickC-LL
05376D5348B11B0B
2012-05-09ChuckNF-PM1
B1=460000, B2=8970000, E=6
2012-05-08ktonyNF
no factor from 2^70 to 2^72
2011-10-28ChuckNF
no factor from 2^69 to 2^70