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

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MnStatusDetails
4538537Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
10166322891029.9old
10093724792425387083772269.82022-11-13 05:01:55
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-20kkmrkkblmbrbk100CC519900C19C81013
Verified (Factored)2018-02-21Oliver Kruse100CC519900C19C8180154613
Verified2022-11-19Funky Waddle158F881B03C3AD1D2104447053
P-1 factors
DateFactorB1B2
2022-11-131009372479242538708377240000240000
History
DateUserTypeResult
2022-11-19iwesCERT
PRP Certification
Proof certified good
2022-11-19Funky WaddleC-PRP
M4538537/1016632289/1009372479242538708377 : 158F881B03C3AD1D
PRP proof power = 7
PRP: Verified
Proof certified good
2022-11-15USAFSSNF-PM1
B1=312000, B2=164461440
2022-11-13USAFSSF-PM1
Factor: 1009372479242538708377 / (P-1, B1=240000)
2018-02-21Oliver KruseC-PRP
M4538537/1016632289 : 100CC519900C19C8
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4538537/1016632289 : 100CC519900C19C8
PRP: Verified (Factored)
PRP without proof (not generated)