is 2 1701653 - 1
has 512249 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-LC3342D9A96C8AE5Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26835.027669.1176%100000002000000001.38889.1089%36.416471.9307%2.8131%
PrimeNet2570.011363.1579%80001300000.00102.7318%0.012364.1643%1.0065%
GPU722610.180565.5738%70001000000.00081.3016%0.181366.0219%0.4481%
Difference+7+34.8471+3.5439%+9993000+199900000+1.3880+7.8074%+36.2351+5.9088%+5.9088%

Known prime factors (2 factors, 196.1 bits, 0.01152371% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17016534707847070304704805228304572788.605138331583181315603276
22 × 3 × 71 × 1932 × 4358801930887
2020-02-0337249435880193088767,265,65116,20630,268
170165322763727959287926129821627168327333107.48866887103185220271494310612
22 × 16721775796305067873577653
2021-09-014167217757963050678735776539.302e+106.217e+161.161e+17

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
170165310716814998234695961076212568062598717837956289004
1781845761
60196.094
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T22:35:00Jocelyn LaroucheManual testing5000050000---0.003--0.489%
2011-02-07T12:51:00Carsten Kossendeyleela900001507500---0.011--2.082%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.765%
2014-05-03T00:50:00Jocelyn LaroucheManual testing150000150000---0.010--0.968%
2014-10-01T23:01:00Jocelyn LaroucheManual testing187719187719---0.013--1.093%
2015-01-07T04:02:00Jocelyn LaroucheManual testing281578281578---0.019--1.344%
2015-02-02T07:32:00Jocelyn LaroucheManual testing309735309735---0.021--1.407%
2015-02-16T20:56:00Jocelyn LaroucheManual testing374778374778---0.026--1.540%
2015-02-18T11:51:00VictordeHollanderManual testing10000000200000000---1.389--9.109%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-02-07T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-09T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:47Mark RoseManual testing258260--0.068--
2010-04-22T12:40:00Architects Cubeda3_bu2260261--0.090--
2016-02-23T16:28:47Mark RoseManual testing261262--0.181--
2010-10-04T14:38:00GrunwalderGIMPManual testing21263--0.938--
2016-02-23T16:28:47Mark RoseManual testing262263--0.577--
2015-02-13T10:43:00VictordeHollanderManual testing263264--1.154--
2015-02-13T10:43:00VictordeHollanderManual testing264265--2.196--
2015-08-30T20:42:00ramgeisManual testing265266--4.391--
2018-06-18T10:05:51TJAOIManual testing266267--8.783--
2019-08-06T10:06:04TJAOIManual testing267268--17.57--


ECM factoring results:

Old Calculation Method

Total ECM effort:209.192 GHz-days
DigitsB1CurvesCompleteFacMiss
2011000943 / 1009.4300.008%
2550000943 / 2803.3683.426%
30250000644 / 6401.00636.530%

New Calculation Method

Total ECM effort:209.192 GHz-days
DigitsB1CompleteFacMiss
201100063.3120.000%
25500008.6310.018%
302500000.89141.019%
3510000000.07293.041%
4030000000.00599.525%


ECM Summary

B1B2factorcurvesGHz-days
50000500000029917.77
2500002500000030089.17
2500002500000010.297
25000025000000343102.0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-21T00:00:00ANONYMOUSv4_computersC3342D9A96C8AE5D0.080
2015-07-19T18:02:00MadPooManual testingC3342D9A96C8AE5D0.080


PRP results:
dateuseridcompidcofactorsres64PRP
2020-02-04T11:05:50Niels_Mache_NextcloudSuperDry-X
470784707030470480522830457
807C3AEA7A8BDC3Bno
2020-02-05T09:46:31marssystemssystem03
470784707030470480522830457
807C3AEA7A8BDC3Bno
2021-09-01T07:59:50Marcel PERRINManual testing
470784707030470480522830457
227637279592879261298216271683273
807C3AEA7A8BDC3Bno


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 374778 (P-1 stage 1)
B1 = 309735 (P-1 stage 1)
B1 = 281578 (P-1 stage 1)
B1 = 187719 (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: 2021-09-06T06:53:08+00:00