is 2 1696451 - 1
has 510683 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-L6364714D269AF90Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26835.135069.1176%100000002000000001.38889.1065%36.523971.9299%2.8123%
PrimeNet2570.011363.1579%80001300000.00102.7302%0.012364.1638%1.0059%
GPU722610.181165.5738%70001000000.00081.3007%0.181966.0216%0.4478%
Difference+7+34.9540+3.5439%+9993000+199900000+1.3880+7.8057%+36.3420+5.9084%+5.9084%

Known prime factors (1 factor, 115.9 bits, 0.00683155% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16964517718496661803515044581323565108829735115.89422748952553900805400749339548
22 × 1171 × 385112863 × 12611202345702019
2019-11-02385112863126112023457020197.836e+1046,887,68787,573,096

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-26T23:36:00Jocelyn LaroucheManual testing5000050000---0.003--0.488%
2011-02-02T14:16:00Carsten Kossendeyleela900001485000---0.011--2.073%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.765%
2014-05-01T10:19:00ANONYMOUSManual testing150000150000---0.010--0.967%
2014-09-30T23:23:00Jocelyn LaroucheManual testing187834187834---0.013--1.093%
2015-01-05T22:25:00Jocelyn LaroucheManual testing281751281751---0.019--1.343%
2015-01-31T14:55:00Jocelyn LaroucheManual testing309926309926---0.021--1.407%
2015-02-15T11:05:00VictordeHollanderManual testing10000000200000000---1.389--9.106%


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--
2015-10-13T10:54:05ramgeisManual testing265266--4.405--
2017-09-08T12:43:25TJAOIManual testing266267--8.810--
2019-06-17T12:15:08TJAOIManual testing267268--17.62--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.916 GHz-days
Estimated T-Level:23.411
DigitsB1CurvesCompleteFacMiss
2011000191 / 1001.91014.666%
2550000191 / 2800.68250.492%
3025000015 / 6400.02397.682%

New Calculation Method

Total ECM effort:14.916 GHz-days
Estimated T-Level:23.411
DigitsB1CompleteFacMiss
20110006.9270.098%
25500000.69449.965%
302500000.05195.018%
3510000000.00399.693%


ECM Summary

B1B2factorcurvesGHz-days
50000500000017610.46
25000025000000154.457


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00ANONYMOUSv4_computers6364714D269AF90E0.080
1999-08-31T00:00:00ANONYMOUSv4_computers6364714D269AF90E0.080
2015-07-03T04:32:00MadPooManual testing6364714D269AF90E0.080


PRP results:
dateuseridcompidcofactorsres64PRP
2019-11-02T12:22:37ATHkaggle
77184966618035150445813235651088297
6E7B0C7B5CF44C5Fno
2019-11-02T12:39:13nordinordiputer
77184966618035150445813235651088297
6E7B0C7B5CF44C5Fno


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 309926 (P-1 stage 1)
B1 = 281751 (P-1 stage 1)
B1 = 187834 (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: 2020-02-03T10:37:56+00:00