is 2 1569181 - 1
has 472371 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-L8161B472596AF476double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26837.984769.1176%100000002000000001.31819.0434%39.302871.9105%2.7928%
PrimeNet2570.012263.1579%70001100000.00082.4773%0.013164.0706%0.9127%
GPU722610.195865.5738%6500600000.00061.0518%0.196465.9359%0.3621%
Difference+7+37.7889+3.5439%+9993500+199940000+1.3175+7.9916%+39.1064+5.9746%+5.9746%

Known prime factors:
No known factors for M1569181

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000300000---0.002--0.865%
2011-01-30T14:01:00James HeinrichWHS800001380000---0.010--1.960%
2013-11-24T11:22:00David Campeaui5-2500k95000027550000---0.155--5.444%
2015-04-05T09:11:00VictordeHollanderManual testing10000000200000000---1.318--9.043%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-25T00:00:00ANONYMOUSv4_computers21257--0.012--
2003-08-08T00:00:00ANONYMOUSv4_computers21258--0.024--
2016-02-23T16:28:39Mark RoseManual testing258260--0.073--
2010-05-03T02:50:00Architects Cubeda3_bu2260261--0.098--
2016-02-23T16:28:39Mark RoseManual testing261262--0.196--
2010-05-24T21:18:00GrunwalderGIMPManual testing21263--1.017--
2016-02-23T16:28:39Mark RoseManual testing262263--0.626--
2015-02-24T22:59:00snme2pm1Manual testing263264--1.251--
2015-02-24T22:59:00snme2pm1Manual testing264265--2.381--
2015-10-11T16:52:57ramgeisManual testing265266--4.762--
2018-01-15T16:18:59TJAOIManual testing266267--9.52--
2018-06-08T13:38:29ramgeisManual testing267268--19.05--


ECM factoring results:

Old Calculation Method

Total ECM effort:30.668 GHz-days
Estimated T-Level:25.336
DigitsB1CurvesCompleteFacMiss
2011000326 / 1003.2603.776%
2550000326 / 2801.16431.150%
3025000043 / 6400.06793.497%

New Calculation Method

Total ECM effort:30.668 GHz-days
Estimated T-Level:25.336
DigitsB1CompleteFacMiss
201100015.1850.000%
25500001.67918.656%
302500000.13987.060%
3510000000.00999.074%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028315.84
250000400000004314.83


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-14T00:00:00ANONYMOUSv4_computers8161B472596AF4760.070
2015-06-28T05:06:00MadPooManual testing8161B472596AF4760.070


PRP results:
No PRP results for M1569181


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:
268
267
266
265
264
263
262
261
260
258
257
250
260
270
280
290
2100
Last modified: 2022-05-26T10:14:37+00:00