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
48122021
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 272
P-1
B1 = 475000
B2 = 3800000
LL
StatusDateUserResidueShiftSoftware
Bad2009-07-21-anonymous-160FA31C6020E9FB36631439Windows,Prime95,v24 final,(aka Wc1)
Verified2015-10-15MadPoo 🙂528E3163B6E2C8BB46107276Windows 64-bit,Prime95,v26,(aka We4)
Verified2016-09-29Mark Rose528E3163B6E2C8BB12171444Linux 64-bit,Prime95,v28.9,build 2
History
DateUserTypeResult
2017-12-15Mark RoseNFno factor TF: 72-73
2016-09-29Mark RoseC-LL528E3163B6E2C8BB
2015-10-15MadPoo 🙂C-LL528E3163B6E2C8BB
2015-08-31wombatmanNFno factor TF: 71-72
2015-08-31wombatmanNFno factor TF: 70-71
2015-07-19Gordon SpenceNFno factor TF: 69-70
2009-07-21jabrownC-LL160FA31C6020E9FB
2009-01-18jabrownNF-PM1B1=475000, B2=3800000
2008-04-24TheJudgerNFno factor TF: 1-69
2003-12-13Thomas MullenNFno factor TF: 1-63
2003-12-13Thomas MullenNFno factor TF: 1-62
2003-12-13Thomas MullenNFno factor TF: 1-64
2003-10-14Thomas MullenNFno factor TF: 1-62
2003-09-21Thomas MullenNFno factor TF: 1-61
2003-06-09Thomas MullenNFno factor TF: 1-60
2003-06-06Thomas MullenNFno factor TF: 1-59