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
11909
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Assignments
AssignedUserWork TypeStage% DoneUpdatedEst CompleteExpired
2026-03-30-anonymous-ECMC1S16.39 %2026-03-302026-04-01
Factored
FactorDigitsBitsDate
18673313824.2old
845175394991402590417141376472996.12009-06-05 09:03:35
137452560355662736179691509653953998212122828946149.92021-05-19 00:47:09
P-1 factors
DateFactorsB1B2
2023-04-06No new factors discovered100000000000122192573512709696
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002056 / 9201
Estimated T-Level: 41.1 ⓘ
TF below 2^132 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 Kruse77DFB7C3B43373532013
Factored
No proof (small exponent)
2017-10-12kkmrkkblmbrbk77DFB7C3B4337353214513
Factored
No proof (small exponent)
2020-04-17Oliver KruseDDB85356796ACF402645153
Verified
No proof (small exponent)
2021-05-19mikrDDB85356796ACF403316053
Verified
No proof (small exponent)
2021-05-20kutensDDB85356796ACF403160053
History
DateUserTypeResult
2025-03-10masserNF-PP1Start=168/29, B1=430000000, B2=429570000000
2025-02-25masserNF-PP1Start=6/5, B1=430000000, B2=429570000000
2025-01-21masserNF-PP1Start=2/7, B1=430000000, B2=429570000000
2023-04-06-anonymous-F-PM1Factor: 84517539499140259041714137647 / B1=100000000000, B2=122192573512709700
2021-05-20kutensC-PRPM11909/18673313/84517539499140259041714137647/1374525603556627361796915096539539982121228289 : DDB85356796ACF40
2021-05-19mikrC-PRPM11909/18673313/84517539499140259041714137647/1374525603556627361796915096539539982121228289 : DDB85356796ACF40
2021-05-19James HintzF-ECMFactor: 1374525603556627361796915096539539982121228289 / ECM curve 1718, B1=3000000, B2=300000000, Montgomery Sigma=5147507118656665
2020-04-17Oliver KruseC-PRPM11909/18673313/84517539499140259041714137647 : DDB85356796ACF40
2017-10-12kkmrkkblmbrbkC-PRPM11909/18673313/84517539499140259041714137647 : 77DFB7C3B4337353
2017-09-21Oliver KruseC-PRPM11909/18673313/84517539499140259041714137647 : 77DFB7C3B4337353
2017-09-21Oliver KruseC-PRPM11909/18673313/84517539499140259041714137647 : 77DFB7C3B4337353
2016-09-07kkmrkkblmbrbkNF-PM1B1=100000000, B2=10000000000, E=12
2009-06-05Rob_DeeF-ECMFactor: 84517539499140259041714137647