Marin Mersenne 2^P-1
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MnStatusDetails
1358491Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
154563942779259323992063.72008-11-25 15:52:04
3488999347397961661475832478.22018-11-02 13:34:09
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Larry English2902F16F0B2FF9520
Verified (Factored)Peter J. Thomford2902F16F0B2FF9520
Verified (Factored)Cornelius Caesar2902F16F0B2FF9520
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01Kriesel8075300367F63B2C013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-30Oliver Kruse84D8FE0083EC2AFE1013
Verified (Factored)2017-10-23kkmrkkblmbrbk84D8FE0083EC2AFE199995813
Verified2018-11-03ANONYMOUS8075300367F63B2C234029853
Verified2018-11-03oodaira8075300367F63B2C212422153
History
DateUserTypeResult
2025-09-03Dr. Markus HauserCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
8075300367F63B2C
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2018-11-03oodairaC-PRP
M1358491/15456394277925932399/348899934739796166147583 : 8075300367F63B2C
PRP: Verified
PRP without proof (not generated)
2018-11-03ANONYMOUSC-PRP
M1358491/15456394277925932399/348899934739796166147583 : 8075300367F63B2C
PRP: Verified
PRP without proof (not generated)
2018-11-02TJAOIF-ECM
Factor: 348899934739796166147583 / (ECM curve 229, B1=50000, B2=5000000)
2017-10-23kkmrkkblmbrbkC-PRP
M1358491/15456394277925932399 : 84D8FE0083EC2AFE
PRP: Verified
PRP without proof (not generated)
2017-09-30Oliver KruseC-PRP
M1358491/15456394277925932399 : 84D8FE0083EC2AFE
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-11-25Luigi MorelliF-ECM
Factor: 15456394277925932399