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

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MnStatusDetails
2878093Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3007671526188266667088332478.02019-10-23 02:43:12
ECM
DigitsB1Curves
255000067 / 280
Estimated T-Level: 21.2 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John LyonD4A49605D9DBE5560
Verified (Factored)1999-08-07Keith O'DellD4A49605D9DBE5561283089
Verified (Factored)2018-09-23kkmrkkblmbrbkD4A49605D9DBE5561945795
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-10-25Justine V.3B641EDEEBD6B7E7165763153
Verified2019-10-26kracker3B641EDEEBD6B7E71139050153
P-1 factors
DateFactorB1B2
2019-10-23300767152618826666708833288000028800000
History
DateUserTypeResult
2019-10-26krackerC-PRP
M2878093/300767152618826666708833 : 3B641EDEEBD6B7E7
PRP: Verified
PRP without proof (not generated)
2019-10-25Justine V.C-PRP
M2878093/300767152618826666708833 : 3B641EDEEBD6B7E7
PRP: Verified
PRP without proof (not generated)
2019-10-23masserF-PM1
Factor: 300767152618826666708833 / (P-1, B1=2880000, B2=28800000, E=12)
2019-01-10chuenkitNF
no factor from 2^67 to 2^68
2018-09-23kkmrkkblmbrbkC-LL
D4A49605D9DBE556
2017-11-12Gordon SpenceNF
no factor from 2^66 to 2^67
2017-08-04JossNF-PM1
B1=400000, B2=4000000, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-19ramgeisNF
no factor from 2^65 to 2^66
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-10dbaughNF
no factor from 2^62 to 2^63
2012-01-18markrNF
no factor from 2^61 to 2^62
2011-09-28markrNF-PM1
B1=200000, B2=4950000, E=6
2011-01-23JossNF-PM1
B1=50000
2010-12-24JossNF-PM1
B1=20000
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=161250
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61