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
6397
Composite, with 5 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
1944689720.9old
7812921384843490486780012479.4old
1111336533129540196042431832786.5old
2859989982791914924836278378611442488573741134.42016-11-17 01:09:46
246310391302706355348446408469989912350399415946150.82021-03-27 16:50:22
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000004245 / 16550
Estimated T-Level: 46.3 ⓘ
TF below 2^149 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
No proof (small exponent)
2017-09-20kkmrkkblmbrbkA1CF7C743D0167E24013
Factored
No proof (small exponent)
2017-09-25George WoltmanA1CF7C743D0167E24287313
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbkA1CF7C743D0167E24013
Factored
No proof (small exponent)
2020-04-17Oliver KruseF6A9374668F7D1FB4453853
Verified
No proof (small exponent)
2021-03-27mikrF6A9374668F7D1FB5395953
Verified
No proof (small exponent)
2021-03-30rbanovF6A9374668F7D1FB5387153
History
DateUserTypeResult
2025-03-20masserNF-PP1Start=169/71, B1=1000000000, B2=999000000000
2025-03-11masserNF-PP1Start=6/5, B1=1000000000, B2=999000000000
2025-03-03masserNF-PP1Start=2/7, B1=1000000000, B2=999000000000
2023-08-06-anonymous-NF-PM1B1=38000000000, B2=159110268557139900
2021-08-02ViliamFNF-PM1B1=500000000, B2=90500000000
2021-03-30rbanovC-PRPM6397/1944689/111133653312954019604243183/781292138484349048678001/28599899827919149248362783786114424885737/2463103913027063553484464084699899123503994159 : F6A9374668F7D1FB
2021-03-27mikrC-PRPM6397/1944689/781292138484349048678001/111133653312954019604243183/28599899827919149248362783786114424885737/2463103913027063553484464084699899123503994159 : F6A9374668F7D1FB
2021-03-27Ryan PropperF-ECMFactor: 2463103913027063553484464084699899123503994159
2020-04-17Oliver KruseC-PRPM6397/1944689/781292138484349048678001/111133653312954019604243183/28599899827919149248362783786114424885737 : F6A9374668F7D1FB
2017-10-02kkmrkkblmbrbkC-PRPM6397/1944689/781292138484349048678001/111133653312954019604243183/28599899827919149248362783786114424885737 : A1CF7C743D0167E2
2017-09-25George WoltmanC-PRPM6397/known_factors : A1CF7C743D0167E2
2017-09-20kkmrkkblmbrbkC-PRPM6397/1944689/781292138484349048678001/111133653312954019604243183/28599899827919149248362783786114424885737 : A1CF7C743D0167E2
2016-11-17kkmrkkblmbrbkF-ECMFactor: 28599899827919149248362783786114424885737