is 2 1569317 - 1
has 472412 decimal digits
takes 0.070 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7321837571C67678double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26718.934368.6567%100000002000000001.31819.7344%20.252471.7078%3.0511%
PrimeNet2570.012263.1579%70001100000.00082.4773%0.013164.0706%0.9127%
GPU722610.195765.5738%6500600000.00061.0518%0.196465.9359%0.3621%
Difference+6+18.7386+3.0829%+9993500+199940000+1.3175+8.6826%+20.0561+5.7719%+5.7719%

Known prime factors (1 factor, 75.1 bits, 0.00478825% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1569317417110976085826286627292375.14313289570433692692
22 × 6653027 × 499380599
2015-12-1366530274993805995,754.12.16963.2912

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000300000---0.002--1.006%
2011-01-30T14:15:00James HeinrichWHS800001380000---0.010--2.218%
2013-11-24T11:45:00David Campeaui5-2500k95000027550000---0.155--5.965%
2015-04-05T09:11:00VictordeHollanderManual testing10000000200000000---1.318--9.734%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-25T00:00:00ANONYMOUSv4_computers21257--0.012--
2003-08-08T00:00:00ANONYMOUSv4_computers21258--0.024--
2010-05-03T03:31:00Architects Cubeda3_bu2260261--0.098--
2010-05-24T21:18:00GrunwalderGIMPManual testing21263--1.017--
2015-02-24T22:59:00snme2pm1Manual testing263264--1.251--
2015-02-24T22:59:00snme2pm1Manual testing264265--2.381--
2015-10-11T16:52:25ramgeisManual testing265266--4.762--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.046 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.046 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024913.93
50000500000020.112


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-10-29T00:00:00ANONYMOUSv4_computers7321837571C676780.070
2015-07-01T17:36:00MadPooManual testing7321837571C676780.070


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:30:57alpertronManual testing
41711097608582628662729
13D0CE3CFCC7D9__no
2017-10-18T09:06:01Oliver KruseThreadripper
41711097608582628662729
13D0CE3CFCC7D9__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 950000, B2 = 27550000 (P-1 stage 2)
B1 = 950000 (P-1 stage 1)
B1 = 80000, B2 = 1380000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 20000, B2 = 300000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
261
258
257
250
260
270
280
290
2100
Last modified: 2019-09-23T15:15:29+00:00