Marin Mersenne 2^P-1
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MnStatusDetails
6272213Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1419279508346581088632166.92011-10-16 20:44:56
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-12-13MIT Prime TeamC077BBF8AB92B8A10
Verified (Factored)2001-01-08Ken BeckerC077BBF8AB92B8A13925632
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-22kkmrkkblmbrbkB4F8BEA0922B4E041477634753
Verified2018-09-26rucioB4F8BEA0922B4E041409327753
History
DateUserTypeResult
2025-01-11Stef42NF-PM1
B1=2031000, B2=5008851540
2023-05-11This -Anonymous-NF-PM1
B1=100000, B2=2000000, E=6
2018-09-26rucioC-PRP
M6272213/141927950834658108863 : B4F8BEA0922B4E04
PRP: Verified
PRP without proof (not generated)
2017-10-22kkmrkkblmbrbkC-PRP
M6272213/141927950834658108863 : B4F8BEA0922B4E04
PRP: Verified
PRP without proof (not generated)
2011-10-16PiepenF-ECM
Factor: 141927950834658108863
2009-06-17Carsten KossendeyNF-PM1
B1=35000, B2=481250