is 2 6990901 - 1
has 2104471 decimal digits
takes 1.524 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC7E2F7991046E2A9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.250465.6716%13500028350000.08923.6041%4.339666.9089%1.2372%
PrimeNet2630.228363.4921%300008000000.02273.3129%0.251064.7015%1.2095%
GPU722674.250465.6716%450009000000.02902.2401%4.279366.4406%0.7690%
Difference---+90000+1935000+0.0602+1.3641%+0.0602+0.4683%+0.4683%

Known prime factors (1 factor, 71.1 bits, 0.00101679% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
699090125003575640540651789512271.083178829421561975
3 × 52 × 23 × 103669229891
2012-09-1325103669229891120.141,785.83,335.5

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-04-14T00:00:00ANONYMOUSv4_computers35000341250---0.016--1.622%
2011-12-12T00:08:00James HeinrichQ66001350002835000---0.089--3.604%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-07-21T00:00:00ANONYMOUSv4_computers21262--0.088--
2000-02-09T00:00:00ANONYMOUSv4_computers21263--0.228--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersB381FE7F2270D9__1.524
2000-03-01T00:00:00ANONYMOUSv4_computersC7E2F7991046E2A91.524
2002-04-20T00:00:00ANONYMOUSv4_computersC7E2F7991046E2A91.524


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-30T11:19:35Oliver KruseGTX-4
2500357564054065178951
1A0A0FAFAD3CDF__no
2019-02-26T01:21:07Yizhe Huangvm
2500357564054065178951
1A0A0FAFAD3CDFFEno


P-1 factor-bounds graph:
B1 = 135000, B2 = 2835000 (P-1 stage 2)
B1 = 135000 (P-1 stage 1)
B1 = 35000, B2 = 341250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-02-26T01:21:07+00:00