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

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MnStatusDetails
197299Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
7536383796231239.5old
208824907685531444.22008-07-27 10:50:10
571838465251300782648243112685.62019-06-21 09:30:26
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000191 / 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
Verified (Factored)2017-09-22Oliver Kruse6502CBE21B4871992013
Verified (Factored)2017-10-12kkmrkkblmbrbk6502CBE21B487199215475613
Verified2019-06-21Niels_Mache_Nextcloud0A4D08D28B7B159833356753
Verified2019-07-06Ruzovej0A4D08D28B7B159836666053
Verified2023-08-24USAFSS0A4D08D28B7B1598314198953
History
DateUserTypeResult
2023-08-24John DalbecCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M197299/753638379623/20882490768553/57183846525130078264824311 : 0A4D08D28B7B1598
PRP proof power = 5
PRP: Verified
Proof certified good
2019-07-06RuzovejC-PRP
M197299/753638379623/20882490768553/57183846525130078264824311 : 0A4D08D28B7B1598
PRP: Verified
PRP without proof (small exponent)
2019-06-21Niels_Mache_NextcloudC-PRP
M197299/753638379623/20882490768553/57183846525130078264824311 : 0A4D08D28B7B1598
PRP: Verified
PRP without proof (small exponent)
2019-06-21TJAOIF-ECM
Factor: 57183846525130078264824311 / (ECM curve 25, B1=250000, B2=25000000)
2017-10-12kkmrkkblmbrbkC-PRP
M197299/753638379623/20882490768553 : 6502CBE21B487199
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M197299/753638379623/20882490768553 : 6502CBE21B487199
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M197299/753638379623/20882490768553 : 6502CBE21B487199
PRP without proof (not generated)
2017-09-18kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2008-07-27J FeitsmaF
Factor: 20882490768553