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
178627Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
124324393926.9old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000187 / 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 Kruse21F49713BBB0D6F31013
Verified2017-10-12kkmrkkblmbrbk21F49713BBB0D6F313891213
Verified2020-04-17Oliver KruseFB0EB2BE074B80F8114683253
Verified2024-02-03Wentao HuangFB0EB2BE074B80F818019353
History
DateUserTypeResult
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M178627/124324393 : FB0EB2BE074B80F8
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M178627/124324393 : FB0EB2BE074B80F8
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M178627/124324393 : 21F49713BBB0D6F3
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M178627/124324393 : 21F49713BBB0D6F3
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M178627/124324393 : 21F49713BBB0D6F3
PRP without proof (not generated)
2017-06-01kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12