is 2 7144201 - 1
has 2150619 decimal digits
takes 1.558 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD794B4DB9850AAA8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.159265.6716%13500029025000.09043.6337%4.249566.9190%1.2474%
PrimeNet2630.223463.4921%300008000000.02273.3245%0.246264.7058%1.2137%
GPU722674.159265.6716%4500010000000.03072.3075%4.189866.4638%0.7921%
Difference---+90000+1902500+0.0597+1.3262%+0.0597+0.4553%+0.4553%

Known prime factors (1 factor, 74.5 bits, 0.00104233% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7144201260955565340370476957532374.4661826345348768676
22 × 3 × 152195445730723
2017-10-114152195445730723977.872,621,7784,896,751

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-02-10T00:00:00ANONYMOUSv4_computers35000507500---0.019--1.824%
2011-12-22T07:19:00James Heinrich3930K1350002902500---0.090--3.634%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-01T00:00:00ANONYMOUSv4_computers21262--0.086--
2005-08-01T00:00:00ANONYMOUSv4_computers21263--0.223--
2014-02-02T23:30:00NesowaManual testing263264--0.275--
2014-02-06T22:41:00lycornManual testing264265--0.523--
2015-06-21T19:54:00VictordeHollanderManual testing265266--1.046--
2016-10-23T19:16:35Gordon SpenceManual testing266267--2.092--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.326 GHz-days
Estimated T-Level:0.200
DigitsB1CurvesCompleteFacMiss
20110004 / 1000.04096.060%
25500004 / 2800.01498.579%

New Calculation Method

Total ECM effort:1.326 GHz-days
Estimated T-Level:0.200
DigitsB1CompleteFacMiss
20110000.12987.895%
25500000.01298.841%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.995
50000500000010.332


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-16T00:00:00sssvsv4_computersD794B4DB9850AAA81.558
2002-02-24T00:00:00ANONYMOUSv4_computersD794B4DB9850AAA81.558


PRP results:
dateuseridcompidcofactorsres64PRP
2018-02-14T21:17:48Oliver KruseGTX-1
26095556534037047695753
2B60343B69E026__no
2019-03-25T08:08:03kkmrkkblmbrbkc5.large
26095556534037047695753
2B60343B69E0263Dno


P-1 factor-bounds graph:
B1 = 135000, B2 = 2902500 (P-1 stage 2)
B1 = 135000 (P-1 stage 1)
B1 = 35000, B2 = 507500 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-03-25T08:08:03+00:00