Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
170509Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
4697287647591238.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000170 / 1566
Estimated T-Level: 30.5
TF below 2^96 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse52E632E636AC95BD1013
Verified2017-10-12kkmrkkblmbrbk52E632E636AC95BD116008713
Verified2020-04-17Oliver Kruse68746E576398356217668153
Verified2024-02-03Wentao Huang68746E5763983562112862353
History
DateUserTypeResult
2025-09-16masserNF-PM1
B1=230000000, B2=22110711552930
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M170509/469728764759 : 68746E5763983562
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M170509/469728764759 : 68746E5763983562
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M170509/469728764759 : 52E632E636AC95BD
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M170509/469728764759 : 52E632E636AC95BD
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M170509/469728764759 : 52E632E636AC95BD
PRP without proof (not generated)
2017-04-22kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12