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
6869
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
257051719927.9old
2921460666357335978391677182403639335114.5old
38509119153368970765281934838627156272906729435148158.12021-03-25 19:13:49
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000003113 / 16550
Estimated T-Level: 45.9 ⓘ
TF below 2^148 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 Kruse38ABF344CD059F582013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbk38ABF344CD059F582013
Factored
No proof (small exponent)
2017-12-07ATH38ABF344CD059F582460913
Factored
No proof (small exponent)
2020-04-17Oliver Kruse1EB23EEB19078D2E240453
Verified
No proof (small exponent)
2021-03-26mnd91EB23EEB19078D2E3315253
Verified
No proof (small exponent)
2021-03-29LaurV1EB23EEB19078D2E3342253
History
DateUserTypeResult
2025-03-23masserNF-PP1Start=162/41, B1=1000000000, B2=999000000000
2025-03-15masserNF-PP1Start=6/5, B1=1000000000, B2=999000000000
2025-03-06masserNF-PP1Start=2/7, B1=1000000000, B2=999000000000
2023-08-17-anonymous-NF-PM1B1=35000000000, B2=149103333456127050
2021-12-16ANONYMOUSNF-PM1B1=100000000
2021-03-29LaurVC-PRPM6869/257051719/29214606663573359783916771824036393/385091191533689707652819348386271562729067294351 : 1EB23EEB19078D2E
2021-03-26mnd9C-PRPM6869/257051719/29214606663573359783916771824036393/385091191533689707652819348386271562729067294351 : 1EB23EEB19078D2E
2021-03-25Ryan PropperF-ECMFactor: 385091191533689707652819348386271562729067294351
2020-04-17Oliver KruseC-PRPM6869/257051719/29214606663573359783916771824036393 : 1EB23EEB19078D2E
2017-12-07ATHC-PRPM6869/257051719/29214606663573359783916771824036393 : 38ABF344CD059F58
2017-10-02kkmrkkblmbrbkC-PRPM6869/257051719/29214606663573359783916771824036393 : 38ABF344CD059F58
2017-09-21Oliver KruseC-PRPM6869/known_factors : 38ABF344CD059F58