is 2 1699517 - 1
has 511606 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-LC7DFBBBDDD65DE81double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26835.071769.1176%100000002000000001.38889.1079%36.460571.9304%2.8127%
PrimeNet2570.011363.1579%80001300000.00102.7312%0.012364.1641%1.0062%
GPU722610.180765.5738%70001000000.00081.3012%0.181666.0217%0.4480%
Difference+7+34.8909+3.5439%+9993000+199900000+1.3880+7.8067%+36.2789+5.9087%+5.9087%

Known prime factors (1 factor, 77.7 bits, 0.00457016% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16995172405429972503290842354172477.67170768046818692924
22 × 3 × 42457 × 138901411661
2019-08-274245713890141166120,442516.43964.54

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T22:34:00Jocelyn LaroucheManual testing5000050000---0.003--0.488%
2011-02-11T18:39:00Carsten Kossendeyleela900001485000---0.011--2.074%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.765%
2014-05-01T10:19:00ANONYMOUSManual testing150000150000---0.010--0.967%
2014-10-01T23:01:00Jocelyn LaroucheManual testing187766187766---0.013--1.093%
2015-01-05T22:25:00Jocelyn LaroucheManual testing281649281649---0.019--1.344%
2015-02-02T07:32:00Jocelyn LaroucheManual testing309813309813---0.021--1.407%
2015-02-15T11:05:00VictordeHollanderManual testing10000000200000000---1.389--9.108%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-02-19T00:00:00ANONYMOUSv4_computers21256--0.006--
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-16T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:47Mark RoseManual testing258260--0.068--
2010-04-26T04:20:00Architects Cubedm1_tt260261--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--0.578--
2015-01-30T19:14:00VictordeHollanderManual testing263264--1.155--
2015-01-30T19:14:00VictordeHollanderManual testing264265--2.198--
2015-10-13T10:54:06ramgeisManual testing265266--4.397--
2017-09-01T10:33:56TJAOIManual testing266267--8.794--
2019-06-17T12:15:07TJAOIManual testing267268--17.59--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.653 GHz-days
Estimated T-Level:21.875
DigitsB1CurvesCompleteFacMiss
2011000105 / 1001.05034.809%
2550000105 / 2800.37568.683%
3025000048 / 6400.07592.769%

New Calculation Method

Total ECM effort:17.653 GHz-days
Estimated T-Level:21.875
DigitsB1CompleteFacMiss
20110005.8390.291%
25500000.74447.497%
302500000.07392.992%
3510000000.00699.435%


ECM Summary

B1B2factorcurvesGHz-days
500005000000573.388
250000250000004814.27


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-02-19T00:00:00ANONYMOUSv4_computersC7DFBBBDDD65DE810.080
1999-04-13T00:00:00ANONYMOUSv4_computersC7DFBBBDDD65DE810.080
1999-08-31T00:00:00ANONYMOUSv4_computersC7DFBBBDDD65DE810.080
2015-07-19T18:02:00MadPooManual testingC7DFBBBDDD65DE810.080


PRP results:
dateuseridcompidcofactorsres64PRP
2019-08-27T18:57:58nordinordiputer
240542997250329084235417
BF0671D53455C096no
2019-08-28T17:16:59kkmrkkblmbrbkc5.large
240542997250329084235417
BF0671D53455C096no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 309813 (P-1 stage 1)
B1 = 281649 (P-1 stage 1)
B1 = 187766 (P-1 stage 1)
B1 = 90000, B2 = 1485000 (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
1012
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
258
257
256
250
260
270
280
290
2100
Last modified: 2019-08-28T17:16:59+00:00