is 2 8003573 - 1
has 2409316 decimal digits
takes 2.090 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L87531E237077FCFAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27029.855567.1429%2400000600000002.09686.7971%31.952369.3762%2.2333%
PrimeNet2630.199463.4921%340009000000.03073.5664%0.230164.7941%1.3020%
GPU722673.712665.6716%5500012000000.04442.5670%3.757066.5529%0.8812%
Difference+3+26.1429+1.4712%+2345000+58800000+2.0524+4.2300%+28.1953+2.8233%+2.8233%

Known prime factors (1 factor, 89.7 bits, 0.00112091% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
800357310145528851264680160427002492889.71363381247670663340988
22 × 103 × 181 × 5521 × 32563 × 4727623
2018-02-2032563472762321,252,1490.10920.1821

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-04-08T04:00:00Squeeky_SquirrelT7500_22001000001950000---0.076--2.265%
2018-02-20T20:55:02mikrColor240000060000000122889.7132.0974.1804.1946.797%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-24T00:00:00ANONYMOUSv4_computers21262--0.077--
1999-05-23T00:00:00ANONYMOUSv4_computers21263--0.199--
2013-07-24T15:40:00c10ck3rManual testing263264--0.245--
2013-09-01T03:13:00David CampeauManual testing264265--0.467--
2015-04-21T00:56:00snme2pm1Manual testing265266--0.934--
2015-11-13T22:26:06snme2pm1Manual testing266267--1.867--
2017-08-18T02:26:04Sid & AndyManual testing267268--3.735--
2017-08-27T12:07:40YxinityManual testing268269--7.469--
2017-08-27T12:07:40YxinityManual testing269270--14.94--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.191 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:1.191 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.09790.776%
25500000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000031.191


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-09-14T00:00:00Brian Campbellv4_computers87531E237077FCFA2.090
1999-12-15T00:00:00Brian Campbellv4_computers87531E237077FCFA2.090
2015-11-06T20:57:52Vteammicael87531E237077FCFA2.090


PRP results:
dateuseridcompidcofactorsres64PRP
2018-07-05T01:38:22ATHec2-PRPCF
1014552885126468016042700249
DB6051E530E84A__no
2019-12-26T08:00:01RuzovejAcer_Duchcov
1014552885126468016042700249
DB6051E530E84A6Eno


P-1 factor-bounds graph:
B1 = 2400000, B2 = 60000000 (P-1 stage 2)
B1 = 2400000 (P-1 stage 1)
B1 = 100000, B2 = 1950000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
270
269
268
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2019-12-26T08:00:01+00:00