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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
5851Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
27986669407177981359230301683983933107.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000003614 / 16550
Estimated T-Level: 46.1
TF below 2^148 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseC2AF5B121A268E9F1013
Verified2017-10-12kkmrkkblmbrbkC2AF5B121A268E9F1175713
Verified2020-04-17Oliver KruseEEAC7D6DBF1702BC157953
Verified2024-02-03Wentao HuangEEAC7D6DBF1702BC1465553
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M5851/279866694071779813592303016839839 : EEAC7D6DBF1702BC
PRP: Verified
PRP without proof (small exponent)
2023-07-22-Anonymous-NF-PM1
B1=42000000000, B2=171618937469779800
2021-12-16Lisander ViaeneNF-PM1
B1=200000000
2021-07-06ViliamFNF-PM1
B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRP
M5851/279866694071779813592303016839839 : EEAC7D6DBF1702BC
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M5851/279866694071779813592303016839839 : C2AF5B121A268E9F
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M5851/279866694071779813592303016839839 : C2AF5B121A268E9F
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M5851/279866694071779813592303016839839 : C2AF5B121A268E9F
PRP without proof (not generated)