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:





MnDetails
49280723
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 273
P-1
B1 = 785000
B2 = 785000
LL
StatusDateUserResidueShiftSoftware
Bad2010-09-20Michael CottrellD328424664EAAADC23329297Windows,Prime95,v25.11,build 2
Verified2015-08-21Greg2E8BA66A36012F992310062CUDALucas v2.05 Beta
Verified2016-09-06endless_mike2E8BA66A36012F99851062Linux 64-bit,Prime95,v28.9,build 2
History
DateUserTypeResult
2024-08-16tbusbyNFno factor TF: 69-70
2017-09-12Jon PaceNFno factor TF: 72-73
2016-09-06endless_mikeC-LL2E8BA66A36012F99
2015-08-21GregC-LL2E8BA66A36012F99
2015-08-08Mark RoseNFno factor TF: 71-72
2015-07-26Mark RoseNFno factor TF: 70-71
2015-07-23Architects CubedNFno factor TF: 69-70
2010-09-20Michael CottrellC-LLD328424664EAAADC
2010-04-07dapikeNF-PM1B1=785000
2008-07-25Team Prime RibNFno factor TF: 1-69
2008-06-03-anonymous-NFno factor TF: 1-64
2007-05-281997rj7NFno factor TF: 1-63
2003-10-23Team Prime RibNFno factor TF: 1-59