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
13291
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
132911617.0old
2346381991910392284833193823145407556097741134.12025-08-01 22:10:20
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001587 / 9201
Estimated T-Level: 40.9 ⓘ
TF below 2^131 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
No proof (small exponent)
2017-09-21Oliver KruseB4A12C53F63555F91013
Factored
No proof (small exponent)
2017-10-12kkmrkkblmbrbkB4A12C53F63555F911301913
Factored
No proof (small exponent)
2020-04-17Oliver Kruse295CB0B2470268CE1612653
Factored
No proof (small exponent)
2024-07-01kkmrkkblmbrbk295CB0B2470268CE11234053
Verified
Uploaded
2025-08-07Resolver295CB0B2470268CE2053
History
DateUserTypeResult
2025-08-07ResolverC-PRPM13291/132911/23463819919103922848331938231454075560977 : 295CB0B2470268CE
Proof Uploaded

Proof Power: 3

2025-08-01Ryan PropperF-ECMFactor: 23463819919103922848331938231454075560977
2025-02-27masserNF-PP1Start=89/37, B1=430000000, B2=429570000000
2025-02-01masserNF-PP1Start=2/7, B1=430000000, B2=429570000000
2025-01-28masserNF-PP1Start=6/5, B1=430000000, B2=429570000000
2024-07-01kkmrkkblmbrbkC-PRPM13291/132911 : 295CB0B2470268CE
2023-12-19-anonymous-NF-PM1B1=100000000000, B2=122154521813133810
2023-05-18JacobZNF-PM1B1=8300000000, B2=34023579430740900
2022-02-05JossNF-PM1B1=1000000, B2=3910366209750
2020-04-17Oliver KruseC-PRPM13291/132911 : 295CB0B2470268CE
2017-10-12kkmrkkblmbrbkC-PRPM13291/132911 : B4A12C53F63555F9
2017-09-21Oliver KruseC-PRPM13291/132911 : B4A12C53F63555F9
2017-09-21Oliver KruseC-PRPM13291/132911 : B4A12C53F63555F9