Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
5381
Composite, with 5 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
48170713825.5old
84224042653211342.9old
966411097549211446.5old
12141103902830367175311672580.0old
15283030309194295775721099816276955130537083145146.82020-10-13 23:05:39
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000011372 / 16550
Estimated T-Level: 48.4 ⓘ
TF below 2^156 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 KruseCDC4F10C74DE87BA4013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbkCDC4F10C74DE87BA4013
Factored
No proof (small exponent)
2017-12-07ATHCDC4F10C74DE87BA4457413
Factored
No proof (small exponent)
2020-04-17Oliver Kruse563EDB84F51561084200053
Verified
No proof (small exponent)
2020-10-13M Miller563EDB84F51561085375453
History
DateUserTypeResult
2025-05-03masserNF-PP1Start=122/31, B1=2100000000, B2=2097900000000
2023-07-06-anonymous-NF-PM1B1=58000000000, B2=237664709340158100
2022-01-24Ethan O'ConnorNF-PM1B1=1300000000
2022-01-24Ethan O'ConnorNF-PM1B1=520000000
2021-08-27Seth_TrNF-PM1B1=400000000
2021-08-27Seth_TrNF-PM1B1=100000000
2020-10-13M MillerC-PRPM5381/48170713/8422404265321/96641109754921/1214110390283036717531167/152830303091942957757210998162769551305370831 : 563EDB84F5156108
2020-10-13Ryan PropperF-ECMFactor: 152830303091942957757210998162769551305370831
2020-04-17Oliver KruseC-PRPM5381/48170713/8422404265321/96641109754921/1214110390283036717531167 : 563EDB84F5156108
2017-12-07ATHC-PRPM5381/48170713/8422404265321/96641109754921/1214110390283036717531167 : CDC4F10C74DE87BA
2017-10-02kkmrkkblmbrbkC-PRPM5381/48170713/8422404265321/96641109754921/1214110390283036717531167 : CDC4F10C74DE87BA
2017-09-21Oliver KruseC-PRPM5381/known_factors : CDC4F10C74DE87BA