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
43853
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
47329355823847691652.1old
36216731906870074798934036798358545795269689498749306947988764163207.82025-08-27 12:55:39
P-1 factors
DateFactorsB1B2
2025-08-27362167319068700747989340367983585457952696894987493069479887641
82000000001800173412167130
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004016 / 4588
Estimated T-Level: 39.4
TF below 2^126 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 Kruse19E5F7AE67FA06791013
Factored
No proof (small exponent)
2017-10-13kkmrkkblmbrbk19E5F7AE67FA06791164613
Factored
No proof (small exponent)
2020-04-17Oliver KruseACEBA160AA097B4F14154153
Factored
No proof (small exponent)
2024-07-01kkmrkkblmbrbkACEBA160AA097B4F191953
Verified
No proof (small exponent)
2025-08-27masserACEBA160AA097B4F22221353
History
DateUserTypeResult
2025-08-27masserC-PRPM43853/4732935582384769/362167319068700747989340367983585457952696894987493069479887641 : ACEBA160AA097B4F
2025-08-27masserF-PM1Factor: 362167319068700747989340367983585457952696894987493069479887641 / B1=8200000000, B2=1800173412167130
2024-07-01kkmrkkblmbrbkC-PRPM43853/4732935582384769 : ACEBA160AA097B4F
2023-04-18JacobZNF-PM1B1=820000000, B2=1012781191031610
2021-06-29ATHNF-PP1Start=2/7, B1=100000000, B2=10000000000
2020-04-17Oliver KruseC-PRPM43853/4732935582384769 : ACEBA160AA097B4F
2017-10-13kkmrkkblmbrbkC-PRPM43853/4732935582384769 : 19E5F7AE67FA0679
2017-09-21Oliver KruseC-PRPM43853/4732935582384769 : 19E5F7AE67FA0679
2017-09-21Oliver KruseC-PRPM43853/4732935582384769 : 19E5F7AE67FA0679
2016-09-19kkmrkkblmbrbkNF-PM1B1=100000000, B2=2000000000, E=12