Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
1889
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
621780217611135.9old
30584791613793975239721652756900963336117.9old
2571883552345885619203941184917114993822928595716150164.12019-10-29 01:14:45
3375837502336033086864159125889460501527041046497978292023959194.42019-11-02 19:32:08
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
6580000000084798 / 194238
Estimated T-Level: 62.2 ⓘ
TF below 2^202 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 KruseCABE913E32328EDB2013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbkCABE913E32328EDB2013
Factored
No proof (small exponent)
2017-12-07ATHCABE913E32328EDB2173513
Factored
No proof (small exponent)
2019-10-29Niels_Mache_Nextcloud3D7B37284999A4FF3104353
Factored
No proof (small exponent)
2019-10-29ATH3D7B37284999A4FF338053
Verified
No proof (small exponent)
2019-11-02mnd93D7B37284999A4FF426553
Verified
No proof (small exponent)
2020-04-17Oliver Kruse3D7B37284999A4FF4159053
History
DateUserTypeResult
2022-12-08mikrNF-PM1B1=400000000000, B2=2574610952249956620
2021-07-25ViliamFNF-PP1Start=2/7, B1=1000000000, B2=221000000000
2020-04-17Oliver KruseC-PRPM1889/62178021761/305847916137939752397216527569009633/25718835523458856192039411849171149938229285957161/33758375023360330868641591258894605015270410464979782920239 : 3D7B37284999A4FF
2019-11-02mnd9C-PRPM1889/62178021761/305847916137939752397216527569009633/25718835523458856192039411849171149938229285957161/33758375023360330868641591258894605015270410464979782920239 : 3D7B37284999A4FF
2019-11-02Ryan PropperF-ECMFactor: 33758375023360330868641591258894605015270410464979782920239
2019-10-29ATHC-PRPM1889/62178021761/305847916137939752397216527569009633/25718835523458856192039411849171149938229285957161 : 3D7B37284999A4FF
2019-10-29Niels_Mache_NextcloudC-PRPM1889/62178021761/305847916137939752397216527569009633/25718835523458856192039411849171149938229285957161 : 3D7B37284999A4FF
2019-10-29Ryan PropperF-ECMFactor: 25718835523458856192039411849171149938229285957161
2017-12-07ATHC-PRPM1889/62178021761/305847916137939752397216527569009633 : CABE913E32328EDB
2017-10-02kkmrkkblmbrbkC-PRPM1889/62178021761/305847916137939752397216527569009633 : CABE913E32328EDB
2017-09-21Oliver KruseC-PRPM1889/known_factors : CABE913E32328EDB
2016-09-07kkmrkkblmbrbkNF-PM1B1=1000000000, B2=100000000000, E=12