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

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Exponent Range:










MnStatusDetails
300491Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
600983619.2old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000168 / 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
Verified2017-09-24Oliver KruseD0811F18FE94D15A1013
Verified2017-10-12Oliver KruseD0811F18FE94D15A16103713
Verified2017-12-11ATHD0811F18FE94D15A15775313
Verified2020-04-18Oliver KruseF64374BD9CACC46B16565253
Verified2022-05-12Jorge CoveiroF64374BD9CACC46B122189753
Verified2024-12-31kkmrkkblmbrbkF64374BD9CACC46B121601753
History
DateUserTypeResult
2024-12-31iczerjonesCERT
PRP Certification
Proof certified good
2024-12-31kkmrkkblmbrbkC-PRP
M300491/600983 : F64374BD9CACC46B
PRP proof power = 5
PRP: Verified
Proof certified good
2024-02-23Denial140NF-PM1
B1=10000000, B2=206662045590
2024-02-22Denial140NF-PM1
B1=10000000
2023-03-13Denial140NF-PM1
B1=1000000, B2=65871826020
2022-05-12Jorge CoveiroC-PRP
M300491/600983 : F64374BD9CACC46B
PRP proof power = 5
PRP: Verified
PRP proof never uploaded
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2021-05-01nordiNF-PP1
Start=6/5, B1=10000000, B2=1010000000
2021-04-24nordiNF-PP1
Start=2/7, B1=10000000, B2=1010000000
2020-04-18Oliver KruseC-PRP
M300491/600983 : F64374BD9CACC46B
PRP: Verified
PRP without proof (small exponent)
2017-12-11ATHC-PRP
M300491/600983 : D0811F18FE94D15A
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M300491/600983 : D0811F18FE94D15A
PRP: Verified
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M300491/600983 : D0811F18FE94D15A
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M300491/600983 : D0811F18FE94D15A
PRP without proof (not generated)