Marin Mersenne 2^P-1
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MnStatusDetails
267601Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
5970355950629874491859.12009-01-22 23:56:49
58301956366554393725659470732892.22020-09-25 11:23:09
ECM
DigitsB1Curves
2550000280 / 280
30250000566 / 640
Estimated T-Level: 29.4 ⓘ
TF below 2^93 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David SlowinskiC160
Verified (Factored)Unknown0C160
Verified (Factored)Brian J. Beesley2561AF6798E70C160
Verified (Factored)Eivind Triel2561AF6798E70C1647498
Verified (Factored)2001-10-27Brian J. Beesley2561AF6798E70C16146055
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-22Oliver KruseE5CCB4CEE2E532521013
Verified (Factored)2017-10-13kkmrkkblmbrbkE5CCB4CEE2E5325214557513
Verified (Factored)2020-04-17Oliver KruseB7D6AD61F080D463123066953
Verified2020-09-25M MillerB7D6AD61F080D463223035353
Verified2020-09-25atrenchB7D6AD61F080D463222356453
History
DateUserTypeResult
2024-10-22yuriy5-1NF-PM1
B1=24619292, B2=6040018914930
2022-03-07LordJuliusNF
no factor from 2^57 to 2^58
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-09-25Ben DeloCERT
PRP Certification
Proof certified good
2020-09-25atrenchC-PRP
M267601/597035595062987449/5830195636655439372565947073 : B7D6AD61F080D463
PRP proof power = 5
PRP: Verified
Proof certified good
2020-09-25Ben DeloCERT
PRP Certification
Proof certified good
2020-09-25M MillerC-PRP
M267601/597035595062987449/5830195636655439372565947073 : B7D6AD61F080D463
PRP proof power = 5
PRP: Verified
Proof certified good
2020-09-25_p95holder_F-ECM
Factor: 5830195636655439372565947073 / (ECM curve 7, B1=250000, B2=25000000)
2020-04-17Oliver KruseC-PRP
M267601/597035595062987449 : B7D6AD61F080D463
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M267601/597035595062987449 : E5CCB4CEE2E53252
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M267601/597035595062987449 : E5CCB4CEE2E53252
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M267601/597035595062987449 : E5CCB4CEE2E53252
PRP without proof (not generated)
2009-01-22Sturle SundeF
Factor: 597035595062987449
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59