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
6271
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Assignments
AssignedUserWork TypeStage% DoneUpdatedEst CompleteExpired
2026-02-22Graham BarnesECM2026-02-232026-02-23
Factored
FactorDigitsBitsDate
13959247823.7old
12464855292340410057371401132890.0old
109808233532575832506471619833547304110330013133591352169.62021-03-30 00:29:10
7104024433712119330078039669447851608206261467428752153175.62021-06-08 21:01:55
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000003177 / 16550
Estimated T-Level: 46.0 ⓘ
TF below 2^148 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 Kruse7CF3B41BAF48FFC62013
Factored
No proof (small exponent)
2017-10-12kkmrkkblmbrbk7CF3B41BAF48FFC62356813
Factored
No proof (small exponent)
2020-04-17Oliver KruseF6AA9A4308E9267C2405753
Factored
No proof (small exponent)
2021-03-30mnd9F6AA9A4308E9267C3437553
Factored
No proof (small exponent)
2021-03-31marssystemsF6AA9A4308E9267C3283853
Verified
No proof (small exponent)
2021-06-08mikrF6AA9A4308E9267C4350353
Verified
No proof (small exponent)
2021-06-10kutensF6AA9A4308E9267C4562853
History
DateUserTypeResult
2025-03-18masserNF-PP1Start=77/41, B1=1000000000, B2=999000000000
2025-03-10masserNF-PP1Start=6/5, B1=1000000000, B2=999000000000
2025-03-01masserNF-PP1Start=2/7, B1=1000000000, B2=999000000000
2023-08-02-anonymous-NF-PM1B1=39000000000, B2=163113042636343800
2021-08-01ViliamFNF-PM1B1=500000000, B2=90500000000
2021-06-10kutensC-PRPM6271/13959247/1246485529234041005737140113/1098082335325758325064716198335473041103300131335913/71040244337121193300780396694478516082062614674287521 : F6AA9A4308E9267C
2021-06-08mikrC-PRPM6271/13959247/1246485529234041005737140113/1098082335325758325064716198335473041103300131335913/71040244337121193300780396694478516082062614674287521 : F6AA9A4308E9267C
2021-06-08Ryan PropperF-ECMFactor: 71040244337121193300780396694478516082062614674287521
2021-03-31marssystemsC-PRPM6271/13959247/1246485529234041005737140113/1098082335325758325064716198335473041103300131335913 : F6AA9A4308E9267C
2021-03-30mnd9C-PRPM6271/13959247/1246485529234041005737140113/1098082335325758325064716198335473041103300131335913 : F6AA9A4308E9267C
2021-03-30Ryan PropperF-ECMFactor: 1098082335325758325064716198335473041103300131335913
2020-04-17Oliver KruseC-PRPM6271/13959247/1246485529234041005737140113 : F6AA9A4308E9267C
2017-10-12kkmrkkblmbrbkC-PRPM6271/13959247/1246485529234041005737140113 : 7CF3B41BAF48FFC6
2017-09-21Oliver KruseC-PRPM6271/13959247/1246485529234041005737140113 : 7CF3B41BAF48FFC6
2017-09-21Oliver KruseC-PRPM6271/13959247/1246485529234041005737140113 : 7CF3B41BAF48FFC6