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

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Exponent Range:










MnStatusDetails
337817Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1982517352678791547.5old
5437290182426712568572168.92014-10-10 12:40:47
ECM
DigitsB1Curves
2550000280 / 280
30250000587 / 640
Estimated T-Level: 29.6
TF below 2^93 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver KruseB5FB4B24875478052013
Verified2017-10-13Oliver KruseB5FB4B248754780525024813
Verified2017-12-12ATHB5FB4B2487547805224645113
Verified2020-04-18Oliver Kruse844E1C5A85B573D1225199653
Verified2024-09-10kkmrkkblmbrbk844E1C5A85B573D1217903653
History
DateUserTypeResult
2024-09-10ShafferCERT
PRP Certification
Proof certified good
2024-09-10kkmrkkblmbrbkC-PRP
M337817/198251735267879/543729018242671256857 : 844E1C5A85B573D1
PRP proof power = 5
PRP: Verified
Proof certified good
2021-06-24George WoltmanNF-PP1
Start=2/7, B1=10000000, B2=830000000
2021-06-24George WoltmanNF-PM1
B1=20000000, B2=1820000000
2020-04-18Oliver KruseC-PRP
M337817/198251735267879/543729018242671256857 : 844E1C5A85B573D1
PRP: Verified
PRP without proof (small exponent)
2017-12-12ATHC-PRP
M337817/198251735267879/543729018242671256857 : B5FB4B2487547805
PRP: Verified
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M337817/198251735267879/543729018242671256857 : B5FB4B2487547805
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M337817/198251735267879/543729018242671256857 : B5FB4B2487547805
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M337817/198251735267879/543729018242671256857 : B5FB4B2487547805
PRP without proof (not generated)
2014-10-10TJAOIF-ECM
Factor: 543729018242671256857 / (ECM curve 15, B1=50000, B2=5000000)