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
27260743
Composite: proven not-prime with Lucas-Lehmer test
No factors below 275
TF target 270
P-1
B1 = 255000
B2 = 1275000
LL
StatusDateUserResidueShiftSoftware
Bad2005-03-20Bill FlusekA75A19FD6D3AC1864880096Windows,Prime95,v23,(aka WZ1)
Verified2011-10-24CJPageB427F7A3B63CADD925293943Windows,Prime95,v25.9,build 4
Verified2012-01-03DubslowB427F7A3B63CADD920566525Windows 64-bit,Prime95,v26.6,build 3
History
DateUserTypeResult
2021-10-11TheJudgerNFno factor TF: 74-75
2021-09-12TheJudgerNFno factor TF: 73-74
2021-08-23TheJudgerNFno factor TF: 72-73
2021-08-23TheJudgerNFno factor TF: 71-72
2021-02-25mikrNFno factor TF: 70-71
2017-03-28ramgeisNFno factor TF: 69-70
2012-01-03DubslowC-LLB427F7A3B63CADD9
2011-11-05David CampeauNFno factor TF: 68-69
2011-11-02David CampeauNFno factor TF: 67-68
2011-10-24CJPageC-LLB427F7A3B63CADD9
2005-03-20Bill FlusekC-LLA75A19FD6D3AC186
2005-01-10Bill FlusekNF-PM1B1=255000, B2=1275000
2004-10-18ANONYMOOSNFno factor TF: 1-67
2004-07-131997rj7NFno factor TF: 1-62
2004-04-09-anonymous-NFno factor TF: 1-61
2001-08-18Net_ForceNFno factor TF: 1-56