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

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MnStatusDetails
2684273Factored
FactorDigitsBitsDate
97180363429902143298972273.02020-09-07 16:14:34
ECM
DigitsB1Curves
255000050 / 280
Estimated T-Level: 20.9
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Timo Aaltonen and friendsA5EC264FF0F4B4AE0
Verified (Factored)1999-04-23Lawrence NgA5EC264FF0F4B4AE392987
Verified (Factored)2018-07-27kkmrkkblmbrbkA5EC264FF0F4B4AE1912710
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-09-07ATHC28F58B0424452141232457753
History
DateUserTypeResult
2020-09-07Ben DeloCERT
PRP Certification
Proof certified good
2020-09-07ATHC-PRP
M2684273/9718036342990214329897 : C28F58B042445214
PRP proof power = 7
PRP: Verified
Proof certified good
2020-09-07daveward2005F-ECM
Factor: 9718036342990214329897 / (ECM curve 5, B1=50000, B2=5000000)
2019-07-04BigBrotherNF-PM1
B1=3000000, B2=90000000, E=12
2019-05-06TJAOINF
no factor from 2^67 to 2^68
2018-09-03JossNF-PM1
B1=486612
2018-07-27kkmrkkblmbrbkC-LL
A5EC264FF0F4B4AE
2017-09-13Gordon SpenceNF
no factor from 2^66 to 2^67
2017-04-07JossNF-PM1
B1=335510, B2=3355100, E=6
2017-01-10JossNF-PM1
B1=232994
2016-12-19JossNF-PM1
B1=194162
2016-06-15JossNF-PM1
B1=161802, B2=4567500, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-01-26ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-11markrNF
no factor from 2^61 to 2^62
2011-02-03markrNF-PM1
B1=105000, B2=2283750, E=6
2010-12-26JossNF-PM1
B1=30000
2010-12-21JossNF-PM1
B1=20000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61