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
3251
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
16641044611431340.6old
345663881427003422516399156219978115456549743141.32019-01-14 05:03:45
82865080082592918908900889732026337905700176906937238354179.12019-10-08 14:09:57
997405771735718087797090013601792939744107856553241587037488635164212.62021-06-22 14:13:55
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000015499 / 40830
Estimated T-Level: 51.9 ⓘ
TF below 2^167 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 Kruse88FFA64E8A2B64A41013
Factored
No proof (small exponent)
2017-10-12kkmrkkblmbrbk88FFA64E8A2B64A41104313
Factored
No proof (small exponent)
2019-01-15GunnarLu5F245C930B7F94E12307253
Factored
No proof (small exponent)
2019-01-15kkmrkkblmbrbk5F245C930B7F94E12162453
Factored
No proof (small exponent)
2019-10-09mnd95F245C930B7F94E13160053
Factored
No proof (small exponent)
2020-04-17Oliver Kruse5F245C930B7F94E13241553
Verified
No proof (small exponent)
2021-06-22Yizhe Huang5F245C930B7F94E14270953
History
DateUserTypeResult
2025-04-24masserNF-PP1Start=163/67, B1=3100000000, B2=3096900000000
2024-05-14masserNF-PM1B1=77000000000, B2=156801561422606100
2021-07-09ViliamFNF-PM1B1=1000000000, B2=191000000000
2021-06-22Yizhe HuangC-PRPM3251/1664104461143/3456638814270034225163991562199781154565497/828650800825929189089008897320263379057001769069372383/9974057717357180877970900136017929397441078565532415870374886351 : 5F245C930B7F94E1
2021-06-22Ryan PropperF-ECMFactor: 9974057717357180877970900136017929397441078565532415870374886351
2020-04-17Oliver KruseC-PRPM3251/1664104461143/3456638814270034225163991562199781154565497/828650800825929189089008897320263379057001769069372383 : 5F245C930B7F94E1
2019-10-09mnd9C-PRPM3251/1664104461143/3456638814270034225163991562199781154565497/828650800825929189089008897320263379057001769069372383 : 5F245C930B7F94E1
2019-10-08Ryan PropperF-ECMFactor: 828650800825929189089008897320263379057001769069372383
2019-01-15kkmrkkblmbrbkC-PRPM3251/1664104461143/3456638814270034225163991562199781154565497 : 5F245C930B7F94E1
2019-01-15GunnarLuC-PRPM3251/1664104461143/3456638814270034225163991562199781154565497 : 5F245C930B7F94E1
2019-01-14James HintzF-ECMFactor: 3456638814270034225163991562199781154565497
2017-10-12kkmrkkblmbrbkC-PRPM3251/1664104461143 : 88FFA64E8A2B64A4
2017-09-21Oliver KruseC-PRPM3251/1664104461143 : 88FFA64E8A2B64A4
2017-09-21Oliver KruseC-PRPM3251/1664104461143 : 88FFA64E8A2B64A4