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

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Exponent Range:










MnStatusDetails
23671Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
33518137825.0old
35648527825.12008-08-26 19:59:08
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000004854 / 9201
Estimated T-Level: 42.6
TF below 2^137 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseFDA789E61EDA0E382013
Verified2017-10-12kkmrkkblmbrbkFDA789E61EDA0E382538913
Verified2020-04-17Oliver Kruse9D4A0CAA5C85463521721853
Verified2024-07-01kkmrkkblmbrbk9D4A0CAA5C85463521189353
History
DateUserTypeResult
2024-11-17masserNF-PP1
Start=2/7, B1=100000000, B2=99900000000
2024-11-14masserNF-PP1
Start=121/29, B1=100000000, B2=99900000000
2024-11-11masserNF-PP1
Start=6/5, B1=100000000, B2=99900000000
2024-07-01kkmrkkblmbrbkC-PRP
M23671/33518137/35648527 : 9D4A0CAA5C854635
PRP: Verified
PRP without proof (small exponent)
2024-02-20nordiNF-PM1
B1=8000000000, B2=2427250412837250
2023-05-02nordiNF-PM1
B1=8000000000
2020-04-17Oliver KruseC-PRP
M23671/33518137/35648527 : 9D4A0CAA5C854635
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M23671/33518137/35648527 : FDA789E61EDA0E38
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M23671/33518137/35648527 : FDA789E61EDA0E38
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M23671/33518137/35648527 : FDA789E61EDA0E38
PRP without proof (not generated)
2016-11-28kkmrkkblmbrbkNF-PM1
B1=500000000, B2=10000000000, E=12
2008-08-26-Anonymous-F
Factor: 35648527