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
7841
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
2367983721.2old
6837353722.7old
1216019928718331546.8old
1318523442927900645096142819207542525479468944143.22023-02-26 06:22:08
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000012446 / 16550
Estimated T-Level: 48.8 ⓘ
TF below 2^157 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 Kruse5C5BCA36CFF3E1383013
Factored
No proof (small exponent)
2017-10-12kkmrkkblmbrbk5C5BCA36CFF3E138346613
Factored
No proof (small exponent)
2020-04-17Oliver KruseD12512A7F1A5E9783327653
Verified
No proof (small exponent)
2023-02-26Kevin_9611D12512A7F1A5E9784469453
History
DateUserTypeResult
2025-05-29masserNF-PP1Start=121/31, B1=1300000000, B2=1298700000000
2024-12-11yuriy_5-1NF-PM1B1=24000000000, B2=93848103835646160
2023-02-26Kevin_9611C-PRPM7841/2367983/6837353/121601992871833/13185234429279006450961428192075425254794689 : D12512A7F1A5E978
2023-02-26Denial140F-ECMFactor: 13185234429279006450961428192075425254794689 / ECM curve 43, B1=43000000, B2=893921898870, Montgomery Sigma=770783052401581
2021-07-10ViliamFNF-PM1B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRPM7841/2367983/6837353/121601992871833 : D12512A7F1A5E978
2017-10-12kkmrkkblmbrbkC-PRPM7841/2367983/6837353/121601992871833 : 5C5BCA36CFF3E138
2017-09-21Oliver KruseC-PRPM7841/2367983/6837353/121601992871833 : 5C5BCA36CFF3E138
2017-09-21Oliver KruseC-PRPM7841/2367983/6837353/121601992871833 : 5C5BCA36CFF3E138