is 2 1701277 - 1
has 512136 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-LD515091F8E3B34A0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.465768.6567%100000002000000001.38889.8030%18.854571.7293%3.0726%
PrimeNet2570.011363.1579%80001300000.00102.7317%0.012364.1643%1.0064%
GPU722610.180665.5738%70001000000.00081.3015%0.181466.0218%0.4481%
Difference+6+17.2851+3.0829%+9993000+199900000+1.3880+8.5015%+18.6731+5.7075%+5.7075%

Known prime factors (1 factor, 85.2 bits, 0.00500653% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1701277436735623440870920730684172685.17512835523651964698304
26 × 32 × 667753 × 33371464043
2018-07-27667753333714640437,680,315124.12231.73

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T22:35:00Jocelyn LaroucheManual testing5000050000---0.003--0.571%
2011-02-07T16:23:00Carsten 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 testing187727187727---0.013--1.247%
2015-01-07T04:02:00Jocelyn LaroucheManual testing281590281590---0.019--1.524%
2015-02-02T07:32:00Jocelyn LaroucheManual testing309749309749---0.021--1.594%
2015-02-15T11:05:00VictordeHollanderManual testing10000000200000000---1.389--9.803%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-29T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-09T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:47Mark RoseManual testing258260--0.068--
2010-04-21T14:51:00Architects 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--4.392--
2018-06-18T10:05:51TJAOIManual testing266267--8.785--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.921 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.921 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024314.45
50000500000080.476


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-21T00:00:00ANONYMOUSv4_computersD515091F8E3B34A00.080
2015-07-19T18:02:00MadPooManual testingD515091F8E3B34A00.080


PRP results:
dateuseridcompidcofactorsres64PRP
2018-07-29T15:36:00Oliver KruseGTX-2
43673562344087092073068417
0F59E75382BE9D__no
2018-07-29T16:20:26ATHec2-PRPCFDC
43673562344087092073068417
0F59E75382BE9D__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 309749 (P-1 stage 1)
B1 = 281590 (P-1 stage 1)
B1 = 187727 (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
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
257
250
260
270
280
290
2100
Last modified: 2020-03-09T11:16:28+00:00