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

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Exponent Range:










MnStatusDetails
236897Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
5685529722.4old
3952592767722491548.52009-02-03 15:16:53
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000247 / 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 Kruse81C6D282EFC021342013
Verified2017-10-12kkmrkkblmbrbk81C6D282EFC0213424691013
Verified2020-04-17Oliver Kruse28D5ACB3380B3BAE213192653
Verified2024-02-03Wentao Huang28D5ACB3380B3BAE27655953
History
DateUserTypeResult
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M236897/5685529/395259276772249 : 28D5ACB3380B3BAE
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-02Oliver KruseNF-PM1
B1=30000000, B2=10120247026890
2021-07-11Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M236897/5685529/395259276772249 : 28D5ACB3380B3BAE
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M236897/5685529/395259276772249 : 81C6D282EFC02134
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M236897/5685529/395259276772249 : 81C6D282EFC02134
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M236897/5685529/395259276772249 : 81C6D282EFC02134
PRP without proof (not generated)
2009-02-03Matthias WurtingerF-ECM
Factor: 395259276772249