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

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MnStatusDetails
2564123Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
230771071927.8old
52024876173431342.22008-07-14 20:25:03
3845002200936125931858.42015-09-03 11:07:52
11947624408903928901162472580.02024-03-16 23:26:34
ECM
DigitsB1Curves
255000052 / 280
Estimated T-Level: 20.9 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-30alpertronF3B4CB78EEBE2CA93013
Verified (Factored)2017-11-11Oliver KruseF3B4CB78EEBE2CA9328111413
Verified2024-03-16Anton Tsvetkov12B2EE3AC319B93E4233062853
History
DateUserTypeResult
2024-03-17PerigCERT
PRP Certification
Proof certified good
2024-03-16Anton TsvetkovC-PRP
M2564123/230771071/5202487617343/384500220093612593/1194762440890392890116247 : 12B2EE3AC319B93E
PRP proof power = 7
PRP: Verified
Proof certified good
2024-03-16Anton TsvetkovF-ECM
Factor: 1194762440890392890116247 / (ECM curve 39, B1=50000, B2=11242140, Edwards Sigma=2930397690598103)
2022-08-29USAFSSNF-PM1
B1=480000, B2=446264910
2017-11-11Oliver KruseC-PRP
M2564123/230771071/5202487617343/384500220093612593 : F3B4CB78EEBE2CA9
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2564123/230771071/384500220093612593/5202487617343 : F3B4CB78EEBE2CA9
PRP: Verified (Factored)
PRP without proof (not generated)
2015-09-03TJAOIF
Factor: 384500220093612593 / TF: 58-59
2008-07-14George WoltmanF-ECM
Factor: 5202487617343