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
14281
Composite, with 5 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
13938257823.7old
18056610791030.72008-08-26 19:58:42
1480736043473449278712167.02008-08-26 19:58:42
996606590877133500347547094308131103.02013-04-04 10:53:14
69417729582616044807140316725408068736119.12019-04-30 23:56:18
P-1 factors
DateFactorsB1B2
2023-11-30No new factors discovered100000000000122815096988293712
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001416 / 9201
Estimated T-Level: 40.8 ⓘ
TF below 2^130 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 Kruse1347A7048D9489EF4013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbk1347A7048D9489EF4013
Factored
No proof (small exponent)
2017-12-07ATH1347A7048D9489EF4858813
Verified
No proof (small exponent)
2019-05-01matzetoni147AB69B719AABB851046353
Verified
No proof (small exponent)
2019-05-02Chang Chia-Tche147AB69B719AABB85303753
History
DateUserTypeResult
2025-02-15masserNF-PP1Start=118/37, B1=355000000, B2=354645000000
2025-02-08masserNF-PP1Start=2/7, B1=355000000, B2=354645000000
2025-01-19masserNF-PP1Start=6/5, B1=355000000, B2=354645000000
2023-11-30-anonymous-F-PM1Factor: 9966065908771335003475470943081 / B1=100000000000, B2=122815096988293710
2023-05-24JacobZNF-PM1B1=7600000000, B2=30020805351537000
2021-08-27Seth_TrNF-PM1B1=400000000
2019-05-02Chang Chia-TcheC-PRPM14281/13938257/1805661079/148073604347344927871/9966065908771335003475470943081/694177295826160448071403167254080687 : 147AB69B719AABB8
2019-05-01matzetoniC-PRPM14281/13938257/1805661079/148073604347344927871/9966065908771335003475470943081/694177295826160448071403167254080687 : 147AB69B719AABB8
2019-04-30Niels_Mache_NextcloudF-ECMFactor: 694177295826160448071403167254080687
2017-12-07ATHC-PRPM14281/13938257/1805661079/148073604347344927871/9966065908771335003475470943081 : 1347A7048D9489EF
2017-10-02kkmrkkblmbrbkC-PRPM14281/13938257/1805661079/148073604347344927871/9966065908771335003475470943081 : 1347A7048D9489EF
2017-09-21Oliver KruseC-PRPM14281/13938257/1805661079/148073604347344927871/9966065908771335003475470943081 : 1347A7048D9489EF
2017-09-21Oliver KruseC-PRPM14281/13938257/1805661079/148073604347344927871/9966065908771335003475470943081 : 1347A7048D9489EF
2013-04-04BloodIceF-ECMFactor: 9966065908771335003475470943081
2008-08-26-anonymous-F-ECMFactor: 148073604347344927871
2008-08-26-anonymous-FFactor: 1805661079