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
43985531
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 272
P-1
B1 = 530000
B2 = 14972500
LL
StatusDateUserResidueShiftSoftware
Bad2010-05-14Jeff Ketchersid7F887CA103EF12C21479231Windows 64-bit,Prime95,v25.11,build 2
Verified2015-11-03Architects Cubed6BB65AAC8A51900822882604Linux 64-bit,Prime95,v27.9,build 1
Verified2016-09-03Mark Rose6BB65AAC8A519008977659Linux 64-bit,Prime95,v28.9,build 2
History
DateUserTypeResult
2018-08-11-anonymous-NFno factor TF: 72-73
2016-09-03Mark RoseC-LL6BB65AAC8A519008
2015-11-03Architects CubedC-LL6BB65AAC8A519008
2015-10-10-anonymous-NFno factor TF: 71-72
2015-09-24VictordeHollanderNFno factor TF: 70-71
2015-04-26LaurVNFno factor TF: 69-70
2014-05-02VictordeHollanderNFno factor TF: 68-69
2010-05-14Jeff KetchersidC-LL7F887CA103EF12C2
2010-04-05Jeff KetchersidNF-PM1B1=530000, B2=14972500, E=6
2007-10-17tscNFno factor TF: 1-68