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
39138553
Composite: proven not-prime with both PRP and Lucas-Lehmer tests
No factors below 273
TF target 272
P-1
B1 = 465000
B2 = 12438750
LL
StatusDateUserResidueShiftSoftware
Bad2007-09-28Joel Vroom7063313DDA7DC27D3372227Windows,Prime95,v24 final,(aka Wc1)
Bad2015-01-09ANONYMOUS02A3DA06B920E80A29300329Windows 64-bit,Prime95,v28.5,build 2
Bad2015-04-25-anonymous-533BE39CBB4C2B7F23205432Windows 64-bit,Prime95,v28.5,build 2
Verified2015-08-31MadPoo 🙂225C4557409EF07C12670732Windows 64-bit,Prime95,v26,(aka We4)
Verified2015-09-02Mark Rose225C4557409EF07C24319885Linux 64-bit,Prime95,v28.6,build 1
PRP
StatusProofDateUserResidueShiftTypeBase
Verified
Certified Good
Power=9
2025-12-24kkmrkkblmbrbkC2CBB6CE56354D06013
History
DateUserTypeResult
2025-12-24ChuckCERT
Proof certified good
2025-12-24kkmrkkblmbrbkC-PRPC2CBB6CE56354D06
Proof Certified Good

Proof Power: 9

2022-06-02Sid & AndyNFno factor TF: 72-73
2019-07-18monstNFno factor TF: 71-72
2015-09-02Mark RoseC-LL225C4557409EF07C
2015-08-31MadPoo 🙂C-LL225C4557409EF07C
2015-04-25-anonymous-C-LL533BE39CBB4C2B7F
2015-01-09ANONYMOUSC-LL02A3DA06B920E80A
2014-12-12Jerry HallettNFno factor TF: 70-71
2014-11-20Mark RoseNFno factor TF: 69-70
2013-09-18Le ComteNFno factor TF: 68-69
2007-09-28-anonymous-C-LL7063313DDA7DC27D
2007-09-13-anonymous-NF-PM1B1=465000, B2=12438750
2006-09-11-anonymous-NFno factor TF: 1-68
2003-09-29-anonymous-NFno factor TF: 1-60
2003-09-14-anonymous-NFno factor TF: 1-59