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
5197
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
31183514.9old
20195543824.3old
3351653138446514619901414054697579959314762967060150164.52021-04-05 11:55:59
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000011699 / 16550
Estimated T-Level: 48.5 ⓘ
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 Kruse4F795807D378E6F42013
Factored
No proof (small exponent)
2017-10-12kkmrkkblmbrbk4F795807D378E6F42366513
Factored
No proof (small exponent)
2020-04-17Oliver Kruse5C78EFACFCBE248C2149653
Verified
No proof (small exponent)
2021-04-05mikr5C78EFACFCBE248C3389953
Verified
No proof (small exponent)
2021-04-09Zero5C78EFACFCBE248C3251553
History
DateUserTypeResult
2025-04-24masserNF-PP1Start=196/31, B1=2100000000, B2=2097900000000
2023-06-25-anonymous-NF-PM1B1=60000000000, B2=253175458787951700
2022-01-25Ethan O'ConnorNF-PM1B1=1300000000, B2=10037823661715850
2021-12-16Oliver KruseNF-PM1B1=1000000000, B2=1002849399191640
2021-12-15ANONYMOUSNF-PM1B1=101101101, B2=242033299467960
2021-04-09ZeroC-PRPM5197/31183/20195543/33516531384465146199014140546975799593147629670601 : 5C78EFACFCBE248C
2021-04-05mikrC-PRPM5197/31183/20195543/33516531384465146199014140546975799593147629670601 : 5C78EFACFCBE248C
2021-04-05Ryan PropperF-ECMFactor: 33516531384465146199014140546975799593147629670601
2020-04-17Oliver KruseC-PRPM5197/31183/20195543 : 5C78EFACFCBE248C
2017-10-12kkmrkkblmbrbkC-PRPM5197/31183/20195543 : 4F795807D378E6F4
2017-09-21Oliver KruseC-PRPM5197/31183/20195543 : 4F795807D378E6F4
2017-09-21Oliver KruseC-PRPM5197/31183/20195543 : 4F795807D378E6F4