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

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Exponent Range:










MnStatusDetails
205603Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
792704718598331446.2old
1601198908736411547.22008-09-30 13:18:00
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000255 / 1566
Estimated T-Level: 30.8
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse7C7C0C852323C1052013
Verified2017-10-12kkmrkkblmbrbk7C7C0C852323C105219761013
Verified2020-04-17Oliver KruseEA004077BEDD57B3210453153
Verified2023-08-03USAFSSEA004077BEDD57B322858853
History
DateUserTypeResult
2023-08-03Chad Steenerson CERT
PRP Certification
Proof certified good
2023-08-03USAFSSC-PRP
M205603/79270471859833/160119890873641 : EA004077BEDD57B3
PRP proof power = 5
PRP: Verified
Proof certified good
2022-02-09Oliver KruseNF-PM1
B1=30000000, B2=10264076402580
2021-05-08Oliver KruseNF-PM1
B1=30000000, B2=3000000000
2020-04-17Oliver KruseC-PRP
M205603/79270471859833/160119890873641 : EA004077BEDD57B3
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M205603/79270471859833/160119890873641 : 7C7C0C852323C105
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M205603/79270471859833/160119890873641 : 7C7C0C852323C105
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M205603/79270471859833/160119890873641 : 7C7C0C852323C105
PRP without proof (not generated)
2008-09-30markrF-PM1
Factor: 160119890873641