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
41842973
Composite: proven not-prime with Lucas-Lehmer test
No factors below 274
TF target 272
P-1
B1 = 500000
B2 = 13375000
LL
StatusDateUserResidueShiftSoftware
Bad2008-03-22Joachim Lundgren9954C9BEE10E981F20682202Windows,Prime95,v24 final,(aka Wc1)
Verified2016-08-06rudimeier732E70393D5045E614154045Linux 64-bit,Prime95,v28.9,build 2
Verified2016-09-29Mark Rose732E70393D5045E68146970Linux 64-bit,Prime95,v28.9,build 2
History
DateUserTypeResult
2024-06-14James HeinrichNFno factor TF: 68-69
2020-01-10-anonymous-NFno factor TF: 73-74
2019-10-05-anonymous-NFno factor TF: 72-73
2016-09-29Mark RoseC-LL732E70393D5045E6
2016-08-06rudimeierC-LL732E70393D5045E6
2015-08-22-anonymous-NFno factor TF: 71-72
2015-02-16Mark RoseNFno factor TF: 70-71
2015-01-12Mark RoseNFno factor TF: 69-70
2013-12-10Carsten KossendeyNFno factor TF: 68-69
2008-03-22ANONYMOUSC-LL9954C9BEE10E981F
2008-02-03ANONYMOUSNF-PM1B1=500000, B2=13375000
2007-04-23-anonymous-NFno factor TF: 1-68