is 2 1704181 - 1
has 513010 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-L94D30E30F137C3B6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26834.975769.1176%100000002000000001.38889.1101%36.364571.9311%2.8134%
PrimeNet2570.011363.1579%80001300000.00102.7326%0.012364.1646%1.0067%
GPU722610.180365.5738%70001000000.00081.3020%0.181166.0220%0.4482%
Difference+7+34.7954+3.5439%+9993000+199900000+1.3880+7.8081%+36.1834+5.9091%+5.9091%

Known prime factors:
No known factors for M1704181

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T22:35:00Jocelyn LaroucheManual testing5000050000---0.003--0.489%
2011-02-07T12:29:00Carsten Kossendeyleela900001507500---0.011--2.083%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.766%
2014-04-27T11:48:00ANONYMOUSManual testing150000150000---0.010--0.968%
2014-10-03T21:04:00Jocelyn LaroucheManual testing187663187663---0.013--1.093%
2015-01-07T04:02:00Jocelyn LaroucheManual testing281494281494---0.019--1.344%
2015-02-13T17:59:00Jocelyn LaroucheManual testing374667374667---0.026--1.540%
2015-02-18T11:51:00VictordeHollanderManual testing10000000200000000---1.389--9.110%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-04T14:18:39Carlos PinhoHomeComputer10000005100000027--0.286


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
1998-12-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-09T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:47Mark RoseManual testing258260--0.068--
2010-04-24T12:42:00Architects Cubeda3_bu2260261--0.090--
2016-02-23T16:28:47Mark RoseManual testing261262--0.180--
2010-10-04T14:39:00GrunwalderGIMPManual testing21263--0.937--
2016-02-23T16:28:47Mark RoseManual testing262263--0.576--
2015-02-13T10:43:00VictordeHollanderManual testing263264--1.152--
2015-02-13T10:43:00VictordeHollanderManual testing264265--2.192--
2015-08-30T20:42:00ramgeisManual testing265266--4.385--
2018-06-18T10:05:50TJAOIManual testing266267--8.770--
2019-07-24T10:13:53TJAOIManual testing267268--17.54--


ECM factoring results:

Old Calculation Method

Total ECM effort:16.648 GHz-days
Estimated T-Level:25.000
DigitsB1CurvesCompleteFacMiss
2011000280 / 1002.8005.996%
2550000280 / 2801.00036.722%

New Calculation Method

Total ECM effort:16.648 GHz-days
DigitsB1CompleteFacMiss
201100010.7690.002%
25500000.99636.919%
302500000.06393.908%
3510000000.00399.707%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028016.65


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computers94D30E30F137C3B60.080
1999-01-02T00:00:00ANONYMOUSv4_computers94D30E30F137C3B60.080
2015-07-06T20:15:00MadPooManual testing94D30E30F137C3B60.080


PRP results:
No PRP results for M1704181


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 374667 (P-1 stage 1)
B1 = 281494 (P-1 stage 1)
B1 = 187663 (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)
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TF factor-bounds graph:
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Last modified: 2021-05-04T14:18:39+00:00