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

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Exponent Range:










MnStatusDetails
13171Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
290631287928.1old
72719302529815163771962.72008-08-29 02:24:32
61077439987886056145795532582.32008-10-25 20:59:11
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001385 / 9201
Estimated T-Level: 40.8
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse607EF1593515C2273013
Verified2017-10-02kkmrkkblmbrbk607EF1593515C2273013
Verified2017-12-07ATH607EF1593515C2273730013
Verified2020-04-17Oliver Kruse8F8643ED4E8441D33300553
Verified2024-07-01kkmrkkblmbrbk8F8643ED4E8441D33349553
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M13171/290631287/6107743998788605614579553/7271930252981516377 : 8F8643ED4E8441D3
PRP: Verified
PRP without proof (small exponent)
2023-10-10-Anonymous-NF-PM1
B1=100000000000, B2=122154521813133810
2023-05-17JacobZNF-PM1
B1=8400000000, B2=34523926202766000
2022-02-05JossNF-PM1
B1=1000000, B2=3910366209750
2020-04-17Oliver KruseC-PRP
M13171/290631287/7271930252981516377/6107743998788605614579553 : 8F8643ED4E8441D3
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M13171/290631287/7271930252981516377/6107743998788605614579553 : 607EF1593515C227
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M13171/290631287/7271930252981516377/6107743998788605614579553 : 607EF1593515C227
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13171/290631287/7271930252981516377/6107743998788605614579553 : 607EF1593515C227
PRP without proof (not generated)
2008-10-25Will EdgingtonF-ECM
Factor: 6107743998788605614579553
2008-08-29-Anonymous-F-ECM
Factor: 7271930252981516377