is 2 1705051 - 1
has 513272 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-L128F42021723F2C8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.427068.6567%500000150000000.08805.0255%17.515070.2319%1.5752%
PrimeNet2570.011363.1579%80001300000.00102.7328%0.012364.1647%1.0068%
GPU722610.180265.5738%70001000000.00081.3021%0.181066.0220%0.4483%
Difference+6+17.2468+3.0829%+493000+14900000+0.0872+3.7234%+17.3340+4.2098%+4.2098%

Known prime factors (1 factor, 69.6 bits, 0.00408245% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17050518996253366835662141192169.608263811855681609
3 × 37 × 2376683384519
2014-01-0837237668338451999.2988,836.416,504

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-29T02:00:00Jocelyn LaroucheManual testing5000050000---0.003--0.571%
2011-02-01T09:15:00Carsten Kossendeyleela900001507500---0.011--2.353%
2016-03-16T12:29:45alpertronManual testing5000001500000012---0.088--5.026%


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--
2022-03-08T23:06:23LordJuliusManual testing258260--0.068--
2010-04-20T22:46:00Architects Cubeda3_bu2260261--0.090--
2010-10-16T22:16:00GrunwalderGIMPManual testing21263--0.936--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.984 GHz-days
Estimated T-Level:24.500
DigitsB1CurvesCompleteFacMiss
2011000252 / 1002.5207.945%
2550000252 / 2800.90040.592%

New Calculation Method

Total ECM effort:14.984 GHz-days
Estimated T-Level:24.500
DigitsB1CompleteFacMiss
20110008.1290.029%
25500000.73547.965%
302500000.04595.577%
3510000000.00299.793%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025214.98


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computers128F42021723F2C80.080
1999-03-26T00:00:00ANONYMOUSv4_computers128F42021723F2C80.080


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:10alpertronManual testing
899625336683566214119
5D69A290994013__no
2017-10-18T19:54:38Oliver KruseGTX-3
899625336683566214119
5D69A290994013__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 90000, B2 = 1507500 (P-1 stage 2)
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: 2022-03-08T23:06:23+00:00