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
55872409
Composite: proven not-prime with Lucas-Lehmer test
No factors below 274
TF target 273
P-1
B1 = 665000
B2 = 19950000
LL
StatusDateUserResidueShiftSoftware
Verified2012-04-23Reed_Young2EA184142A332F696011204Linux 64-bit,Prime95,v26.6,build 3
Verified2020-09-27Roland Clarkson2EA184142A332F690gpuowl
History
DateUserTypeResult
2020-09-27Roland ClarksonC-LL
2EA184142A332F69
2019-03-25ChuckNFno factor TF: 73-74
2012-04-23Reed_YoungC-LL
2EA184142A332F69
2011-10-19kdgehmanNF-PM1B1=665000, B2=19950000, E=6
2011-09-23vats09NFno factor TF: 72-73
2011-09-23vats09NFno factor TF: 71-72
2011-09-23vats09NFno factor TF: 70-71
2011-03-27kdgehmanNFno factor TF: 69-70
2011-03-27kdgehmanNFno factor TF: 68-69
2009-05-301997rj7NFno factor TF: 67-68
2009-03-18PiepenNFno factor TF: 66-67
2009-03-16PiepenNFno factor TF: 65-66
2009-03-14GreyOwlNFno factor TF: 64-65
2008-12-011997rj7NFno factor TF: 1-64
2002-08-17-anonymous-NFno factor TF: 1-58
2001-09-22-anonymous-NFno factor TF: 1-57
2000-06-11-anonymous-NFno factor TF: 1-56
2000-03-01-anonymous-NFno factor TF: 1-54
2000-01-19-anonymous-NFno factor TF: 1-53
1999-12-15-anonymous-NFno factor TF: 1-53