is 2 1704953 - 1
has 513242 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-LCC51C75DB44A71E7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.428068.6567%100000002000000001.38889.8048%18.816871.7299%3.0732%
PrimeNet2570.011363.1579%80001300000.00102.7328%0.012364.1647%1.0068%
GPU722610.180265.5738%70001000000.00081.3021%0.181066.0220%0.4483%
Difference+6+17.2478+3.0829%+9993000+199900000+1.3880+8.5027%+18.6358+5.7078%+5.7078%

Known prime factors (1 factor, 103.2 bits, 0.00605393% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17049531178380426531730339108381954037732103.2173455756336191467856029996
22 × 3 × 79 × 1061 × 64189 × 53525259545063
2018-11-1664189535252595450631.084e+11199,004371,683

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-29T02:00:00Jocelyn LaroucheManual testing5000050000---0.003--0.571%
2011-02-07T12:50:00Carsten Kossendeyleela900001507500---0.011--2.353%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.883%
2014-04-28T00:45:00Jocelyn LaroucheManual testing150000150000---0.010--1.109%
2014-10-03T21:04:00Jocelyn LaroucheManual testing187646187646---0.013--1.247%
2015-01-07T04:02:00Jocelyn LaroucheManual testing281469281469---0.019--1.524%
2015-02-13T17:59:00Jocelyn LaroucheManual testing374633374633---0.026--1.739%
2015-02-18T11:51:00VictordeHollanderManual testing10000000200000000---1.389--9.805%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-28T00:00:00ANONYMOUSv4_computers21257--0.011--
1999-03-26T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:47Mark RoseManual testing258260--0.068--
2010-04-20T22:46:00Architects Cubeda3_bu2260261--0.090--
2016-02-23T16:28:47Mark RoseManual testing261262--0.180--
2010-10-16T22:16:00GrunwalderGIMPManual testing21263--0.936--
2016-02-23T16:28:47Mark RoseManual testing262263--0.576--
2015-02-13T10:43:00VictordeHollanderManual testing263264--1.152--
2015-02-13T10:43:00VictordeHollanderManual testing264265--2.191--
2015-08-30T20:42:00ramgeisManual testing265266--4.383--
2018-06-18T10:05:50TJAOIManual testing266267--8.766--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.924 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.924 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000022413.32
500005000000271.605


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computersCC51C75DB44A71E70.080
1999-03-26T00:00:00ANONYMOUSv4_computersCC51C75DB44A71E70.080
2015-07-06T20:15:00MadPooManual testingCC51C75DB44A71E70.080


PRP results:
dateuseridcompidcofactorsres64PRP
2018-11-16T23:45:37rucio
11783804265317303391083819540377
B47EEFEAB9C526__no
2018-11-17T08:23:00kkmrkkblmbrbkc5d.large
11783804265317303391083819540377
B47EEFEAB9C526__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 374633 (P-1 stage 1)
B1 = 281469 (P-1 stage 1)
B1 = 187646 (P-1 stage 1)
B1 = 90000, B2 = 1507500 (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)
103
104
105
106
107
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
257
250
260
270
280
290
2100
2110
Last modified: 2020-03-23T10:26:51+00:00