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

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Exponent Range:










MnStatusDetails
303217Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
9736679923431239.8old
3662607282347031548.42013-12-29 20:15:16
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 Kruse2B39A0EA7F9F0EBA2013
Verified2017-10-12Oliver Kruse2B39A0EA7F9F0EBA27889113
Verified2017-12-11ATH2B39A0EA7F9F0EBA23005513
Verified2020-04-18Oliver KruseCFB370EE04E8DC96227987553
Verified2024-08-23kkmrkkblmbrbkCFB370EE04E8DC9628456453
History
DateUserTypeResult
2024-08-23kerni3CERT
PRP Certification
Proof certified good
2024-08-23kkmrkkblmbrbkC-PRP
M303217/973667992343/366260728234703 : CFB370EE04E8DC96
PRP proof power = 5
PRP: Verified
Proof certified good
2024-02-23Denial140NF-PM1
B1=10000000, B2=206662045590
2024-02-22Denial140NF-PM1
B1=10000000
2023-03-16Denial140NF-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
M303217/973667992343/366260728234703 : CFB370EE04E8DC96
PRP: Verified
PRP without proof (small exponent)
2017-12-11ATHC-PRP
M303217/973667992343/366260728234703 : 2B39A0EA7F9F0EBA
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M303217/973667992343/366260728234703 : 2B39A0EA7F9F0EBA
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M303217/973667992343/366260728234703 : 2B39A0EA7F9F0EBA
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M303217/973667992343/366260728234703 : 2B39A0EA7F9F0EBA
PRP without proof (not generated)
2013-12-29Richard B. WoodsF-ECM
Factor: 366260728234703