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
194071Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
200669069349311111754.2old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000196 / 1566
Estimated T-Level: 30.6
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 KruseEF23EF1B5B666D581013
Verified2017-09-22Oliver KruseEF23EF1B5B666D581013
Verified2017-11-06kkmrkkblmbrbkEF23EF1B5B666D58114755213
Verified2020-04-17Oliver KruseFD6DD2C006458C2F16279953
Verified2023-08-24USAFSSFD6DD2C006458C2F110426053
History
DateUserTypeResult
2023-08-24LOBESCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M194071/20066906934931111 : FD6DD2C006458C2F
PRP proof power = 5
PRP: Verified
Proof certified good
2021-07-11ATHNF-PP1
Start=2/7, B1=15000000, B2=1500000000
2020-04-17Oliver KruseC-PRP
M194071/20066906934931111 : FD6DD2C006458C2F
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M194071/20066906934931111 : EF23EF1B5B666D58
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M194071/20066906934931111 : EF23EF1B5B666D58
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M194071/20066906934931111 : EF23EF1B5B666D58
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M194071/20066906934931111 : EF23EF1B5B666D58
PRP without proof (not generated)
2017-09-02kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12