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
40575707
Composite: proven not-prime with Lucas-Lehmer test
No factors below 275
TF target 272
P-1
B1 = 1000000
B2 = 20000000
LL
StatusDateUserResidueShiftSoftware
Bad2009-06-26curtisc638F31A80FA6499B29915550Windows Service,Prime95,v25.8,build 1
Verified2016-05-23Mark Rose623A44026533F79016511077Linux 64-bit,Prime95,v28.9,build 2
Verified2016-08-08MadPoo 🙂623A44026533F79021721991Windows 64-bit,Prime95,v26,(aka We4)
History
DateUserTypeResult
2024-05-29mrhNFno factor TF: 68-69
2020-09-10Sid & AndyNFno factor TF: 74-75
2020-05-11Sid & AndyNF-PM1B1=1000000, B2=20000000
2020-01-17-anonymous-NFno factor TF: 73-74
2019-09-30-anonymous-NFno factor TF: 72-73
2016-08-08MadPoo 🙂C-LL623A44026533F790
2016-05-23Mark RoseC-LL623A44026533F790
2015-06-13Luigi MorelliNFno factor TF: 71-72
2014-12-28NickOfTimeNFno factor TF: 70-71
2014-12-28NickOfTimeNFno factor TF: 69-70
2013-11-08Carsten KossendeyNFno factor TF: 68-69
2009-06-26curtiscC-LL638F31A80FA6499B
2007-11-17-anonymous-NF-PM1B1=670000
2007-01-16Team Prime RibNFno factor TF: 1-68