is 2 1696657 - 1
has 510745 decimal digits
takes 0.080 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L466062ADD3F83AC0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.513268.6567%100000002000000001.38889.8007%18.902071.7286%3.0718%
PrimeNet2570.011363.1579%80001300000.00102.7303%0.012364.1638%1.0059%
GPU722610.181165.5738%70001000000.00081.3008%0.181966.0216%0.4478%
Difference+6+17.3322+3.0829%+9993000+199900000+1.3880+8.4999%+18.7202+5.7070%+5.7070%

Known prime factors (1 factor, 94.9 bits, 0.00559410% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1696657372878150371077386374428546232994.91310988613207356507130623
17 × 23 × 107 × 503 × 522172945421693
2016-09-045035221729454216933.420e+91,941,4063,626,006

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-26T23:36:00Jocelyn LaroucheManual testing5000050000---0.003--0.570%
2011-02-10T16:22:00Carsten Kossendeyleela900001485000---0.011--2.342%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.882%
2014-05-01T10:19:00ANONYMOUSManual testing150000150000---0.010--1.108%
2014-09-30T23:23:00Jocelyn LaroucheManual testing187830187830---0.013--1.247%
2015-01-05T22:25:00Jocelyn LaroucheManual testing281745281745---0.019--1.524%
2015-01-31T14:55:00Jocelyn LaroucheManual testing309919309919---0.021--1.593%
2015-02-15T11:05:00VictordeHollanderManual testing10000000200000000---1.389--9.801%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-24T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:46Mark RoseManual testing258260--0.068--
2010-04-24T12:42:00Architects Cubedm1_tt260261--0.091--
2016-02-23T16:28:46Mark RoseManual testing261262--0.181--
2010-09-26T01:51:00GrunwalderGIMPManual testing21263--0.941--
2016-02-23T16:28:46Mark RoseManual testing262263--0.579--
2015-01-30T19:14:00VictordeHollanderManual testing263264--1.157--
2015-01-30T19:14:00VictordeHollanderManual testing264265--2.202--
2015-10-11T16:52:37ramgeisManual testing265266--4.404--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.916 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.916 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024814.74
50000500000030.178


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06T00:00:00ANONYMOUSv4_computers466062ADD3F83AC00.080
2015-07-19T18:02:00MadPooManual testing466062ADD3F83AC00.080


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T03:03:26Oliver KruseGTX-1
37287815037107738637442854623
0C5C736454D735__no
2017-11-03T13:11:24ATHec2-1xf
37287815037107738637442854623
0C5C736454D735__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 309919 (P-1 stage 1)
B1 = 281745 (P-1 stage 1)
B1 = 187830 (P-1 stage 1)
B1 = 90000, B2 = 1485000 (P-1 stage 2)
B1 = 150000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-02-17T11:30:55+00:00