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

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Exponent Range:










MnStatusDetails
191677Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
8076158678820971549.5old
91026113681154330791963.02008-08-26 20:12:59
ECM
DigitsB1Curves
2550000280 / 280
30250000630 / 640
Estimated T-Level: 29.9
TF below 2^94 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver KruseCC9156592D6A23152013
Verified2017-10-12kkmrkkblmbrbkCC9156592D6A2315210206713
Verified2020-04-17Oliver Kruse25AE32C58B948F8322352453
Verified2023-08-24USAFSS25AE32C58B948F8321352953
History
DateUserTypeResult
2023-08-24Richard KintCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M191677/807615867882097/9102611368115433079 : 25AE32C58B948F83
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M191677/807615867882097/9102611368115433079 : 25AE32C58B948F83
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M191677/807615867882097/9102611368115433079 : CC9156592D6A2315
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M191677/807615867882097/9102611368115433079 : CC9156592D6A2315
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M191677/807615867882097/9102611368115433079 : CC9156592D6A2315
PRP without proof (not generated)
2017-07-29kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2008-08-26-Anonymous-F-ECM
Factor: 9102611368115433079