Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
9187
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
256880899847361819163408084121323153984940130.9old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000006668 / 16550
Estimated T-Level: 47.0
TF below 2^151 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver KruseB68831616F41BC1D1013
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbkB68831616F41BC1D1013
Verified
No proof (small exponent)
2017-12-07ATHB68831616F41BC1D1128813
Verified
No proof (small exponent)
2020-04-17Oliver Kruse5F8F52449DC3A6D51831753
Verified
No proof (small exponent)
2024-07-01kkmrkkblmbrbk5F8F52449DC3A6D51211253
History
DateUserTypeResult
2025-04-12masserNF-PP1Start=79/53, B1=1000000000, B2=999000000000
2024-07-01kkmrkkblmbrbkC-PRPM9187/2568808998473618191634080841213231539849 : 5F8F52449DC3A6D5
2023-07-12JacobZNF-PM1B1=63000000000, B2=255469764292442700
2021-12-16ANONYMOUSNF-PM1B1=100000000
2020-04-17Oliver KruseC-PRPM9187/2568808998473618191634080841213231539849 : 5F8F52449DC3A6D5
2017-12-07ATHC-PRPM9187/2568808998473618191634080841213231539849 : B68831616F41BC1D
2017-10-02kkmrkkblmbrbkC-PRPM9187/2568808998473618191634080841213231539849 : B68831616F41BC1D
2017-09-21Oliver KruseC-PRPM9187/known_factors : B68831616F41BC1D
2003-02-27-anonymous-NF-PM1B1=4290000000
2002-12-09-anonymous-NFno factor TF: 1-57
2002-11-02-anonymous-NF-PM1B1=3221225472, B2=4290000000, E=48
2002-08-31-anonymous-NF-PM1B1=2147483648, B2=4290000000, E=48
2002-06-15-anonymous-NF-PM1B1=1073741824, B2=4290000000, E=48
2001-09-16-anonymous-NF-PM1B1=3000000000, B2=4290000000
2001-06-30-anonymous-NF-PM1B1=43000000, B2=4290000000
2001-02-11-anonymous-NF-PM1B1=1000000, B2=100000000
2000-07-17-anonymous-NFno factor TF: 1-56
2000-03-01-anonymous-NFno factor TF: 54-55
1999-12-30-anonymous-NFno factor TF: 53-54
1999-09-22-anonymous-NFno factor TF: 52-53