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
3851
Composite, with 5 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
7703412.9old
141777934327779831753.7old
37265783305854094416273661184224133108.2old
42373955269056213789575732935802333108.4old
473936379817808595298485660566920432137121.82010-05-22 06:19:32
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000014667 / 40830
Estimated T-Level: 51.8 ⓘ
TF below 2^167 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver KruseED80E42DE80D460C5013
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbkED80E42DE80D460C5013
Verified
No proof (small exponent)
2017-12-07ATHED80E42DE80D460C5241713
Verified
No proof (small exponent)
2020-04-17Oliver KruseBBD45A5348F201EE5164153
Factored
No proof (small exponent)
2022-05-12Jorge CoveiroBBD45A5348F201EE149153
Verified
No proof (small exponent)
2024-02-03Wentao HuangBBD45A5348F201EE5205853
History
DateUserTypeResult
2025-05-06masserNF-PP1Start=110/29, B1=2600000000, B2=2597400000000
2024-07-07masserNF-PM1B1=77000000000, B2=61509798838397910
2024-02-03Wentao HuangC-PRPM3851/7703/14177793432777983/372657833058540944162736611842241/423739552690562137895757329358023/4739363798178085952984856605669204321 : BBD45A5348F201EE
2022-12-18Kevin_9611NF-PM1B1=1000000000, B2=3226259836800
2022-05-12Jorge CoveiroC-PRPM3851/7703 : BBD45A5348F201EE
2021-08-27Seth_TrNF-PM1B1=100000000
2020-04-17Oliver KruseC-PRPM3851/7703/14177793432777983/372657833058540944162736611842241/423739552690562137895757329358023/4739363798178085952984856605669204321 : BBD45A5348F201EE
2017-12-07ATHC-PRPM3851/7703/14177793432777983/372657833058540944162736611842241/423739552690562137895757329358023/4739363798178085952984856605669204321 : ED80E42DE80D460C
2017-10-02kkmrkkblmbrbkC-PRPM3851/7703/14177793432777983/372657833058540944162736611842241/423739552690562137895757329358023/4739363798178085952984856605669204321 : ED80E42DE80D460C
2017-09-21Oliver KruseC-PRPM3851/known_factors : ED80E42DE80D460C
2010-05-22James HintzF-ECMFactor: 4739363798178085952984856605669204321
2005-03-20-anonymous-F-PM1Factor: 14177793432777983