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
1381
Composite, with 5 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
8287413.0old
4628532836231238.8old
203146024843656575212064.1old
3243477805888796093567568025513098.0old
571794315755318170521117911273930116790578164120435608415439961201.82020-10-22 23:48:27
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000073339 / 105362
Estimated T-Level: 58.5 ⓘ
TF below 2^189 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
No proof (small exponent)
2017-09-27Oliver Kruse5F12ECA1920135814013
Factored
No proof (small exponent)
2017-10-09Chang Chia-Tche5F12ECA1920135814013
Factored
No proof (small exponent)
2017-10-12kkmrkkblmbrbk5F12ECA192013581464613
Factored
No proof (small exponent)
2020-04-17Oliver Kruse8B47394C9B3C899A456053
Factored
No proof (small exponent)
2020-08-12_p95holder_8B47394C9B3C899A464853
Verified
No proof (small exponent)
2020-10-23James Heinrich8B47394C9B3C899A540853
Verified
No proof (small exponent)
2020-10-23ANONYMOUS8B47394C9B3C899A5107853
Verified
No proof (small exponent)
2020-10-26Klaus Nordmann8B47394C9B3C899A5111153
History
DateUserTypeResult
2021-07-20ViliamFNF-PP1Start=2/7, B1=1000000000, B2=221000000000
2021-03-27nordiNF-PM1B1=1000000000000, B2=2232843418649129478
2020-10-26Klaus NordmannC-PRPM1381/8287/462853283623/20314602484365657521/324347780588879609356756802551/5717943157553181705211179112739301167905781641204356084154399 : 8B47394C9B3C899A
2020-10-23ANONYMOUSC-PRPM1381/8287/462853283623/20314602484365657521/324347780588879609356756802551/5717943157553181705211179112739301167905781641204356084154399 : 8B47394C9B3C899A
2020-10-23James HeinrichC-PRPM1381/8287/462853283623/20314602484365657521/324347780588879609356756802551/5717943157553181705211179112739301167905781641204356084154399 : 8B47394C9B3C899A
2020-10-22Ryan PropperF-ECMFactor: 5717943157553181705211179112739301167905781641204356084154399
2020-08-12_p95holder_C-PRPM1381/8287/462853283623/20314602484365657521/324347780588879609356756802551 : 8B47394C9B3C899A
2020-04-17Oliver KruseC-PRPM1381/8287/462853283623/20314602484365657521/324347780588879609356756802551 : 8B47394C9B3C899A
2017-10-12kkmrkkblmbrbkC-PRPM1381/8287/462853283623/20314602484365657521/324347780588879609356756802551 : 5F12ECA192013581
2017-10-09Chang Chia-TcheC-PRPM1381/known_factors : 5F12ECA192013581
2017-09-27Oliver KruseC-PRPM1381/8287/462853283623/20314602484365657521/324347780588879609356756802551 : 5F12ECA192013581
2017-09-25csabaC-PRPM1381/known_factors : 5F12ECA192013581
2016-09-07kkmrkkblmbrbkNF-PM1B1=1000000000, B2=100000000000, E=12
2009-10-25Carsten KossendeyF-PM1Factor: 1244089482176922584170794270445359243286876351