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
39527687
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 272
P-1
B1 = 475000
B2 = 12587500
LL
StatusDateUserResidueShiftSoftware
Verified2007-09-13Michael Schiansky8CDEA969BA2CF98A12699370Linux 32-bit,Prime95,v24 final,(aka Wc2)
Verified2017-04-09Chuck8CDEA969BA2CF98A31931100Windows 64-bit,Prime95,v28.10,build 1
Verified2017-04-13ATH8CDEA969BA2CF98A38989974Windows 64-bit,Prime95,v28.9,build 2
Verified2017-05-07kracker8CDEA969BA2CF98A22665359Windows 64-bit,Prime95,v28.10,build 1
History
DateUserTypeResult
2022-05-29Bill StaffenNFno factor TF: 72-73
2017-05-07krackerC-LL8CDEA969BA2CF98A
2017-04-13ATHC-LL8CDEA969BA2CF98A
2017-04-09ChuckC-LL8CDEA969BA2CF98A
2014-12-07Gordon SpenceNFno factor TF: 71-72
2014-12-07Gordon SpenceNFno factor TF: 70-71
2014-12-07Gordon SpenceNFno factor TF: 69-70
2013-10-11VictordeHollanderNFno factor TF: 68-69
2007-09-13Stefan RinkC-LL8CDEA969BA2CF98A
2007-08-14Stefan RinkNF-PM1B1=475000, B2=12587500
2006-10-24curtiscNFno factor TF: 1-68
2001-03-05JossNFno factor TF: 1-56