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
1217
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Assignments
AssignedUserWork TypeStage% DoneUpdatedEst CompleteExpired
2026-07-04circleECM2026-09-162027-04-10
2026-07-04circleECM2026-09-162027-04-01
2026-07-04circleECM2026-09-162027-03-22
2026-07-04circleECM2026-09-162027-03-12
2026-07-04circleECM2026-09-162027-03-01
2026-07-04circleECM2026-09-162027-02-19
2026-07-04circleECM2026-09-162027-02-09
2026-07-04circleECM2026-09-162027-01-30
2026-07-04circleECM2026-09-162027-01-20
2026-07-04circleECM2026-09-162027-01-10
2026-07-04circleECM2026-09-162026-12-31
2026-07-04circleECM2026-09-162026-12-21
2026-07-04circleECM2026-09-162026-12-11
2026-07-04circleECM2026-09-162026-12-01
2026-07-04circleECM2026-09-162026-11-21
2026-07-04circleECM2026-09-162026-11-11
2026-07-04circleECM2026-09-162026-11-01
2026-07-04circleECM2026-09-162026-10-22
2026-07-04circleECM2026-09-162026-10-12
2026-07-04circleECM2026-09-162026-10-02
2026-07-04circleECM2026-09-162026-09-22
Factored
FactorDigitsBitsDate
10457413271030.0old
611677327216784338497677785806321391701055732591835687955182.02011-10-25 23:11:29
2205339002190205644435429315470100667404910975779766879956183.82014-05-21 01:54:31
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
65800000000194238 / 194238
702400000000148475 / 350860
Estimated T-Level: 67.1 ⓘ
TF below 2^218 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-27Oliver KruseF54FFA290FC61C273013
Verified
No proof (small exponent)
2017-10-09Chang Chia-TcheF54FFA290FC61C273013
Verified
No proof (small exponent)
2017-10-12kkmrkkblmbrbkF54FFA290FC61C27350913
Verified
No proof (small exponent)
2020-04-17Oliver Kruse6A5D96C6B126C44D39753
Verified
No proof (small exponent)
2020-08-12_p95holder_6A5D96C6B126C44D359153
History
DateUserTypeResult
2025-08-26ViliamFNF-PP1Start=6/5, B1=50000000000, B2=5000000000000
2025-08-24ViliamFNF-PP1Start=2/7, B1=50000000000, B2=5000000000000
2024-04-29Joe S.NF-PM1B1=1300000000000, B2=13019537381887526490
2021-09-28Oliver KruseNF-PP1Start=3/1, B1=10000000000, B2=9924641473652116
2021-07-18ViliamFNF-PP1Start=2/7, B1=1000000000, B2=221000000000
2021-03-27nordiNF-PM1B1=1000000000000, B2=2232843418649129478
2020-12-22Ruslan BorisovNFno factor TF: 56-57
2020-12-22Ruslan BorisovNFno factor TF: 55-56
2020-12-22Ruslan BorisovNFno factor TF: 54-55
2020-12-22Ruslan BorisovNFno factor TF: 53-54
2020-12-22Ruslan BorisovNFno factor TF: 52-53
2020-12-22Ruslan BorisovNFno factor TF: 51-52
2020-12-22Ruslan BorisovNFno factor TF: 30-51
2020-08-12_p95holder_C-PRP
M1217/1045741327/6116773272167843384976777858063213917010557325918356879/22053390021902056444354293154701006674049109757797668799 : 6A5D96C6B126C44D
2020-04-17Oliver KruseC-PRP
M1217/1045741327/6116773272167843384976777858063213917010557325918356879/22053390021902056444354293154701006674049109757797668799 : 6A5D96C6B126C44D
2017-10-12kkmrkkblmbrbkC-PRPM1217/1045741327/6116773272167843384976777858063213917010557325918356879/22053390021902056444354293154701006674049109757797668799 : F54FFA290FC61C27
2017-10-09Chang Chia-TcheC-PRPM1217/known_factors : F54FFA290FC61C27
2017-09-27Oliver KruseC-PRPM1217/1045741327/6116773272167843384976777858063213917010557325918356879/22053390021902056444354293154701006674049109757797668799 : F54FFA290FC61C27
2017-09-25csabaC-PRPM1217/known_factors : F54FFA290FC61C27
2016-09-07kkmrkkblmbrbkNF-PM1B1=1000000000, B2=100000000000, E=12
2014-05-21-anonymous-F-ECMFactor: 22053390021902056444354293154701006674049109757797668799
2011-10-25Michael KennF-ECMFactor: 6116773272167843384976777858063213917010557325918356879