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
4273
Composite, with 5 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
25639514.6old
719086079929.4old
1327670353162609477132166.8old
581914315075037620149949566232995.6old
1693747248536618081504448297981842131009293245993294353173.52020-10-01 03:41:55
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000012055 / 40830
Estimated T-Level: 51.5 ⓘ
TF below 2^166 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 Kruse0EA99051603194174013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbk0EA99051603194174013
Factored
No proof (small exponent)
2017-12-07ATH0EA99051603194174245013
Factored
No proof (small exponent)
2020-04-17Oliver Kruse8AFA05C962E70FEF4311553
Verified
No proof (small exponent)
2020-10-01M Miller8AFA05C962E70FEF57753
Verified
No proof (small exponent)
2020-10-01Team_Inspector8AFA05C962E70FEF5328853
History
DateUserTypeResult
2025-05-13masserNF-PP1Start=189/61, B1=2600000000, B2=2597400000000
2023-05-20-anonymous-NF-PM1B1=75000000000, B2=751710476301835050
2021-07-05ViliamFNF-PM1B1=1000000000, B2=201000000000
2020-10-01Team_InspectorC-PRPM4273/25639/719086079/132767035316260947713/58191431507503762014994956623/16937472485366180815044482979818421310092932459932943 : 8AFA05C962E70FEF
2020-10-01M MillerC-PRPM4273/25639/719086079/132767035316260947713/58191431507503762014994956623/16937472485366180815044482979818421310092932459932943 : 8AFA05C962E70FEF
2020-10-01Ryan PropperF-ECMFactor: 16937472485366180815044482979818421310092932459932943
2020-04-17Oliver KruseC-PRPM4273/25639/719086079/132767035316260947713/58191431507503762014994956623 : 8AFA05C962E70FEF
2017-12-07ATHC-PRPM4273/25639/719086079/132767035316260947713/58191431507503762014994956623 : 0EA9905160319417
2017-10-02kkmrkkblmbrbkC-PRPM4273/25639/719086079/132767035316260947713/58191431507503762014994956623 : 0EA9905160319417
2017-09-21Oliver KruseC-PRPM4273/known_factors : 0EA9905160319417
2009-10-25Carsten KossendeyFFactor: 18436647979481