Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
2178571Factored
FactorDigitsBitsDate
10174625983071059087772269.82020-10-23 12:16:22
ECM
DigitsB1Curves
2550000123 / 280
Estimated T-Level: 22.2
TF below 2^69 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Richard LarsonE56AFC3A6618142E0
Verified (Factored)1999-07-27Stephen WoodE56AFC3A6618142E2020319
Verified (Factored)2018-04-13kkmrkkblmbrbkE56AFC3A6618142E660451
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-10-23mrh061E060AEE9A11041207463053
History
DateUserTypeResult
2020-10-27hktCERT
PRP Certification
Proof certified good
2020-10-23mrhC-PRP
M2178571/1017462598307105908777 : 061E060AEE9A1104
PRP proof power = 7
PRP: Verified
Proof certified good
2020-10-23mnd9F-ECM
Factor: 1017462598307105908777 / (ECM curve 3, B1=50000, B2=5000000, Sigma=3120353356939125)
2019-11-30mikrNF-PM1
B1=5000000, B2=200000000, E=12
2019-11-28BigBrotherNF-PM1
B1=3000000, B2=90000000, E=12
2019-04-22TJAOINF
no factor from 2^67 to 2^68
2018-04-13kkmrkkblmbrbkC-LL
E56AFC3A6618142E
2016-11-17Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-01-02ramgeisNF
no factor from 2^65 to 2^66
2015-12-22HBendtzNF-PM1
B1=700000, B2=21000000, e=12
2015-03-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-25VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-06JossNF-PM1
B1=148924
2014-06-21JossNF-PM1
B1=119462
2013-09-09ramgeisNF
no factor from 2^62 to 2^63
2011-01-14markrNF-PM1
B1=90000, B2=1620000, E=6
2010-11-08JossNF-PM1
B1=30000
2010-11-05JossNF-PM1
B1=15000
2009-01-08Sturle SundeNF
no factor from 2^61 to 2^62
2009-01-04Sturle SundeNF
no factor from 2^60 to 2^61