is 2 1700341 - 1
has 511854 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-L28A4BAA6C1230AEBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.475368.6567%100000002000000001.38889.8025%18.864171.7291%3.0724%
PrimeNet2570.011363.1579%80001300000.00102.7314%0.012364.1642%1.0063%
GPU722610.180765.5738%70001000000.00081.3014%0.181566.0218%0.4480%
Difference+6+17.2946+3.0829%+9993000+199900000+1.3880+8.5011%+18.6826+5.7074%+5.7074%

Known prime factors (1 factor, 72.6 bits, 0.00427247% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
170034173922732383635924263832272.6472173761980203851
33 × 5867 × 13722465139
2018-05-26586713722465139773.2151.02095.290

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T22:35:00Jocelyn LaroucheManual testing5000050000---0.003--0.571%
2011-02-09T16:50:00Carsten Kossendeyleela900001507500---0.011--2.352%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.883%
2014-05-03T00:50:00Jocelyn LaroucheManual testing150000150000---0.010--1.108%
2014-10-01T23:01:00Jocelyn LaroucheManual testing187748187748---0.013--1.247%
2015-01-05T22:25:00Jocelyn LaroucheManual testing281622281622---0.019--1.524%
2015-02-02T07:32:00Jocelyn LaroucheManual testing309784309784---0.021--1.594%
2015-02-15T11:05:00VictordeHollanderManual testing10000000200000000---1.389--9.803%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00PHeedev4_computers21257--0.011--
2003-02-09T00:00:00ANONYMOUSv4_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--0.181--
2010-10-04T14:38:00GrunwalderGIMPManual testing21263--0.939--
2016-02-23T16:28:47Mark RoseManual testing262263--0.577--
2015-02-13T10:43:00VictordeHollanderManual testing263264--1.155--
2015-02-13T10:43:00VictordeHollanderManual testing264265--2.197--
2015-08-30T20:42:00ramgeisManual testing265266--4.395--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.920 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.920 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000023513.97
500005000000160.951


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28T00:00:00PHeedev4_computers28A4BAA6C1230AEB0.080
2015-07-10T01:00:00MadPooManual testing28A4BAA6C1230AEB0.080


PRP results:
dateuseridcompidcofactorsres64PRP
2018-05-27T00:40:22Oliver KruseGTX-3
7392273238363592426383
36C7E2AEB1A655__no
2018-05-27T08:16:08BattlemaxxWork
7392273238363592426383
36C7E2AEB1A655__no
2018-05-28T01:30:27ANONYMOUSdory
7392273238363592426383
36C7E2AEB1A655__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 309784 (P-1 stage 1)
B1 = 281622 (P-1 stage 1)
B1 = 187748 (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)
102
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105
106
107
102
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104
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1010
1011
TF factor-bounds graph:
267
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265
264
263
262
261
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258
257
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2100
Last modified: 2020-02-17T11:30:46+00:00