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
3911
Composite, with 7 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
7823412.9old
49997979468948891652.2old
1607545893715135191857.2old
363214584531834267811032374.9old
16625425435192796551786393576077309525739127.0old
380791722555543149556241301891916038142577276946151.42009-07-10 02:52:45
69603618317857178370967017498434219749226948260642563870776960198.82020-04-22 22:55:13
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000013153 / 40830
Estimated T-Level: 51.6 ⓘ
TF below 2^166 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 KruseCFFEC70A8CD769326013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbkCFFEC70A8CD769326013
Factored
No proof (small exponent)
2017-12-07ATHCFFEC70A8CD769326206413
Factored
No proof (small exponent)
2020-04-17Oliver KruseD1758C697262371D61453
Verified
No proof (small exponent)
2020-04-22M MillerD1758C697262371D7227953
Factored
No proof (small exponent)
2022-05-12Jorge CoveiroD1758C697262371D157653
History
DateUserTypeResult
2025-05-07masserNF-PP1Start=114/71, B1=2600000000, B2=2597400000000
2023-05-15JacobZNF-PM1B1=67000000000, B2=674804699646066990
2022-05-12Jorge CoveiroC-PRPM3911/7823 : D1758C697262371D
2021-09-09Jinyuan WangNF-PM1B1=1300000000, B2=13000000000
2020-04-22M MillerC-PRPM3911/7823/4999797946894889/160754589371513519/36321458453183426781103/166254254351927965517863935760773095257/3807917225555431495562413018919160381425772769/696036183178571783709670174984342197492269482606425638707769 : D1758C697262371D
2020-04-22Ryan PropperF-ECMFactor: 696036183178571783709670174984342197492269482606425638707769
2020-04-17Oliver KruseC-PRPM3911/7823/4999797946894889/160754589371513519/36321458453183426781103/166254254351927965517863935760773095257/3807917225555431495562413018919160381425772769 : D1758C697262371D
2017-12-07ATHC-PRPM3911/7823/4999797946894889/160754589371513519/36321458453183426781103/166254254351927965517863935760773095257/3807917225555431495562413018919160381425772769 : CFFEC70A8CD76932
2017-10-02kkmrkkblmbrbkC-PRPM3911/7823/4999797946894889/160754589371513519/36321458453183426781103/166254254351927965517863935760773095257/3807917225555431495562413018919160381425772769 : CFFEC70A8CD76932
2017-09-21Oliver KruseC-PRPM3911/known_factors : CFFEC70A8CD76932
2009-07-10unconnectedF-ECMFactor: 3807917225555431495562413018919160381425772769