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

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MnDetails
857
Composite, with 3 known prime factors. Cofactor is PRP (Probable-Prime).
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
6857412.7old
28930637472110663365069373875446114402381839564440271822752760197.52009-01-21 02:52:40
66252047253322576640009261104469841704264667142338527590849609178961607219175248.62009-01-21 02:52:40
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
No proof (small exponent)
2024-09-06George WoltmanPRP_PRP_PRP_PRP_3013
History
DateUserTypeResult
2024-09-06George WoltmanP-PRPM857/6857/289306374721106633650693738754461144023818395644402718227527/662520472533225766400092611044698417042646671423385275908496091789616072191
PRP Cofactor
2009-01-21-anonymous-F-ECMFactor: 662520472533225766400092611044698417042646671423385275908496091789616072191
2009-01-21-anonymous-F-ECMFactor: 289306374721106633650693738754461144023818395644402718227527