Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
6691
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
321169618.3old
2711538990891238.0old
1099240408764301747682712476.5old
93880005186062308025328054835952002728107515240748159.42021-03-28 13:44:39
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000002801 / 16550
Estimated T-Level: 45.8 ⓘ
TF below 2^147 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 KruseE0E31D00CB246F403013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbkE0E31D00CB246F403013
Factored
No proof (small exponent)
2017-12-07ATHE0E31D00CB246F403445013
Factored
No proof (small exponent)
2020-04-17Oliver KruseF53DD371347572973294653
Verified
No proof (small exponent)
2021-03-28mikrF53DD371347572974557553
History
DateUserTypeResult
2025-03-22masserNF-PP1Start=124/31, B1=1000000000, B2=999000000000
2025-03-13masserNF-PP1Start=6/5, B1=1000000000, B2=999000000000
2025-03-05masserNF-PP1Start=2/7, B1=1000000000, B2=999000000000
2023-08-12-anonymous-NF-PM1B1=36000000000, B2=144600212653396500
2021-12-18Oliver KruseNF-PM1B1=1000000000, B2=1080854750315340
2021-03-28mikrC-PRPM6691/321169/271153899089/109924040876430174768271/938800051860623080253280548359520027281075152407 : F53DD37134757297
2021-03-28Ryan PropperF-ECMFactor: 938800051860623080253280548359520027281075152407
2020-04-17Oliver KruseC-PRPM6691/321169/271153899089/109924040876430174768271 : F53DD37134757297
2017-12-07ATHC-PRPM6691/321169/271153899089/109924040876430174768271 : E0E31D00CB246F40
2017-10-02kkmrkkblmbrbkC-PRPM6691/321169/271153899089/109924040876430174768271 : E0E31D00CB246F40
2017-09-21Oliver KruseC-PRPM6691/known_factors : E0E31D00CB246F40