Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2280947Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
29645004305618091651.4old
2148488524429848233772167.52022-10-20 13:43:31
3742234734131966835245292478.32022-12-17 06:52:35
250947758067052863249199932684.42025-09-19 07:47:23
ECM
DigitsB1Curves
2550000280 / 280
30250000128 / 640
Estimated T-Level: 26.0 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-11Oliver Kruse19AC6FBF2C59F80D1013
Verified (Factored)2017-11-29kkmrkkblmbrbk19AC6FBF2C59F80D1112621513
Verified (Factored)2022-10-20Kevin_9611ACE95457E5E50076275911053
Verified (Factored)2022-12-18LordJuliusACE95457E5E500763211563853
Verified2025-09-25Oliver KruseACE95457E5E500764053
History
DateUserTypeResult
2025-09-25TigrusCERT
PRP Certification
Proof certified good
2025-09-25Oliver KruseC-PRP
M2280947/2964500430561809/214848852442984823377/374223473413196683524529/25094775806705286324919993 : ACE95457E5E50076
PRP proof power = 7
PRP: Verified
Proof certified good
2025-09-19TJAOIF-ECM
Factor: 25094775806705286324919993 / (ECM curve 26, B1=250000, B2=254050335, Edwards Sigma=5695710238747023)
2022-12-18fre_gamesCERT
PRP Certification
Proof certified good
2022-12-18LordJuliusC-PRP
M2280947/2964500430561809/214848852442984823377/374223473413196683524529 : ACE95457E5E50076
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2022-12-17_p95holder_F-ECM
Factor: 374223473413196683524529 / (ECM curve 6, B1=50000, B2=5000000)
2022-10-20PCanalytics.comCERT
PRP Certification
Proof certified good
2022-10-20Kevin_9611C-PRP
M2280947/2964500430561809/214848852442984823377 : ACE95457E5E50076
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2022-10-20TJAOIF
Factor: 214848852442984823377 / TF: 67-68
2017-11-29kkmrkkblmbrbkC-PRP
M2280947/2964500430561809 : 19AC6FBF2C59F80D
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-11Oliver KruseC-PRP
M2280947/2964500430561809 : 19AC6FBF2C59F80D
PRP: Verified (Factored)
PRP without proof (not generated)
2016-04-11alpertronNF-PM1
B1=500000, B2=15000000, E=12