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

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MnStatusDetails
2323549Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2663189578077602235836278632787.82017-12-10 20:56:43
ECM
DigitsB1Curves
2550000108 / 280
Estimated T-Level: 21.9 ⓘ
TF below 2^68 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Oliveira5746881D121D4FD70
Verified (Factored)1999-07-04Ekkehard Domning5746881D121D4FD7310888
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-12-15Oliver KruseCBB671533FC062C91173321653
Verified2017-12-15kkmrkkblmbrbkCBB671533FC062C91144226153
Verified2017-12-25Yaroslav BerezhkoCBB671533FC062C912183453
P-1 factors
DateFactorB1B2
2017-12-102663189578077602235836278636000000180000000
History
DateUserTypeResult
2018-03-05alpertronNF-PM1
B1=500000, B2=15000000, E=12
2017-12-25Yaroslav BerezhkoC-PRP
M2323549/266318957807760223583627863 : CBB671533FC062C9
PRP: Verified
PRP without proof (not generated)
2017-12-15kkmrkkblmbrbkC-PRP
M2323549/266318957807760223583627863 : CBB671533FC062C9
PRP: Verified
PRP without proof (not generated)
2017-12-15Oliver KruseC-PRP
M2323549/266318957807760223583627863 : CBB671533FC062C9
PRP: Verified
PRP without proof (not generated)
2017-12-10Sid & AndyF-PM1
Factor: 266318957807760223583627863 / (P-1, B1=6000000, B2=180000000, E=12)
2017-06-03Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-10-25ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-26Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-02-22BudNF-PM1
B1=500000, B2=10000000, E=12
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61