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
303917Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
677613343211136.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000169 / 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 Kruse6D9218EA1A845B0F1013
Verified2017-10-12Oliver Kruse6D9218EA1A845B0F116341013
Verified2017-12-11ATH6D9218EA1A845B0F110451613
Verified2020-04-18Oliver Kruse02EFCC539C394A6A117343953
Verified2024-08-23kkmrkkblmbrbk02EFCC539C394A6A112252353
History
DateUserTypeResult
2024-08-23Ben NewsamCERT
PRP Certification
Proof certified good
2024-08-23kkmrkkblmbrbkC-PRP
M303917/67761334321 : 02EFCC539C394A6A
PRP proof power = 5
PRP: Verified
Proof certified good
2024-02-23Denial140NF-PM1
B1=10000000, B2=206662045590
2024-02-22Denial140NF-PM1
B1=10000000
2023-03-17Denial140NF-PM1
B1=1000000, B2=65871826020
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2021-04-30nordiNF-PP1
Start=6/5, B1=10000000, B2=1010000000
2021-04-24nordiNF-PP1
Start=2/7, B1=10000000, B2=1010000000
2020-04-18Oliver KruseC-PRP
M303917/67761334321 : 02EFCC539C394A6A
PRP: Verified
PRP without proof (small exponent)
2017-12-11ATHC-PRP
M303917/67761334321 : 6D9218EA1A845B0F
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M303917/67761334321 : 6D9218EA1A845B0F
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M303917/67761334321 : 6D9218EA1A845B0F
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M303917/67761334321 : 6D9218EA1A845B0F
PRP without proof (not generated)