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
39751183
Composite: proven not-prime with both PRP and Lucas-Lehmer tests
No factors below 273
TF target 272
P-1
B1 = 1000000
B2 = 30000000
LL
StatusDateUserResidueShiftSoftware
Bad2008-03-05Jean Flinois4981C0D9F4E7F3C522534745Linux 32-bit,Prime95,v23,(aka WZ2)
Bad2010-10-06Seim500D132342C7CE2E11773478Windows 64-bit,Prime95,v25.11,build 2
Bad2015-08-05-anonymous-BC01304529D7769C35703523Windows,Prime95,v25.11,build 2
Verified2015-11-04MadPoo 🙂CA9F9905A663F71015638675Windows 64-bit,Prime95,v26,(aka We4)
Verified2015-12-23Hung Chien-HuaCA9F9905A663F71010309844Windows,Prime95,v28.7,build 1
PRP
StatusProofDateUserResidueShiftTypeBase
Verified
Certified Good
Power=9
2025-12-24kkmrkkblmbrbk13A122DED72249D1013
History
DateUserTypeResult
2025-12-24mhoneyCERT
Proof certified good
2025-12-24kkmrkkblmbrbkC-PRP13A122DED72249D1
Proof Certified Good

Proof Power: 9

2019-10-11-anonymous-NFno factor TF: 72-73
2019-07-03monstNFno factor TF: 71-72
2015-12-23Hung Chien-HuaC-LLCA9F9905A663F710
2015-11-04firejugglerNF-PM1B1=1000000, B2=30000000, E=12
2015-11-04MadPoo 🙂C-LLCA9F9905A663F710
2015-08-05-anonymous-C-LLBC01304529D7769C
2014-12-11Sid & AndyNFno factor TF: 70-71
2014-12-10Mark RoseNFno factor TF: 69-70
2010-10-06SeimC-LL500D132342C7CE2E
2008-03-03-anonymous-C-LL4981C0D9F4E7F3C5
2007-12-03-anonymous-NFno factor TF: 1-69
2007-12-03-anonymous-NF-PM1B1=585000
2006-11-09ebravickNFno factor TF: 1-68