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

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MnStatusDetails
2157767Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1532211905197088479932167.1old
7562193212008816729992169.42024-11-12 10:18:59
ECM
DigitsB1Curves
2550000280 / 280
30250000165 / 640
Estimated T-Level: 26.3
TF below 2^82 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Lloyd83BBFFD03D85304A0
Verified (Factored)1999-02-21Charles Bell83BBFFD03D85304A1345675
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-08Oliver Kruse5EBBA34386F8168D1013
Verified (Factored)2017-11-18kkmrkkblmbrbk5EBBA34386F8168D130171013
Verified2024-11-13Naegi Makoto96EE9FAF8D7440BC2208018053
History
DateUserTypeResult
2024-11-13JOHNRDCERT
PRP Certification
Proof certified good
2024-11-13Naegi MakotoC-PRP
M2157767/153221190519708847993/756219321200881672999 : 96EE9FAF8D7440BC
PRP proof power = 7
PRP: Verified
Proof certified good
2024-11-12TJAOIF-ECM
Factor: 756219321200881672999 / (ECM curve 4, B1=250000, B2=251325195, Edwards Sigma=8562327547137936)
2017-11-18kkmrkkblmbrbkC-PRP
M2157767/153221190519708847993 : 5EBBA34386F8168D
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-08Oliver KruseC-PRP
M2157767/153221190519708847993 : 5EBBA34386F8168D
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-29alpertronNF-PM1
B1=500000, B2=15000000, E=12