is 2 8105707 - 1
has 2440061 decimal digits
takes 2.116 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE25DF660A93AE716double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2687.353466.1765%2200000190837614040.153112.4037%47.506670.3718%4.1954%
PrimeNet2630.196963.4921%360009000000.03153.6133%0.228464.8112%1.3191%
GPU722673.665865.6716%5500012000000.04442.5722%3.710266.5546%0.8830%
Difference+1+3.6876+0.5048%+2145000+1907176140+40.1087+9.8315%+43.7963+3.8172%+3.8172%

Known prime factors (1 factor, 79.1 bits, 0.00097587% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
81057076482030972454353928694732479.10139984365166754448
24 × 11 × 41 × 179 × 57331 × 539947
2012-09-225733153994722,5850.03170.0442

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-11-02T00:00:00ANONYMOUSv4_computers40000310000---0.021--1.454%
2022-06-19T01:31:00FlaukrotistColab_HLM222000001908376140-
skipped known factor: 648203097245435392869473
--40.15--12.404%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-24T00:00:00ANONYMOUSv4_computers21262--0.076--
1999-05-23T00:00:00ANONYMOUSv4_computers21263--0.197--
2012-07-19T10:33:00AxelssonManual testing263264--0.242--
2022-04-07T22:32:04LordJuliusManual testing21264--0.439--
2022-04-10T17:02:44James HeinrichManual testing264265--0.461--
2022-04-07T22:32:04LordJuliusManual testing264265--0.461--
2022-04-10T17:02:44James HeinrichManual testing265266--0.922--
2022-04-07T22:32:04LordJuliusManual testing265266--0.922--
2022-04-10T17:02:44James HeinrichManual testing266267--1.844--
2022-04-07T22:32:04LordJuliusManual testing266267--1.844--
2022-01-30T09:41:10FlaukrotistManual testing267268--3.688--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-01-12T00:00:00ANONYMOUSv4_computersE25DF660A93AE7162.116
2002-11-16T00:00:00ANONYMOUSv4_computersE25DF660A93AE7162.116


PRP results:
dateuseridcompidcofactorsres64PRP
2018-08-15T05:26:40Oliver KruseGTX-5
648203097245435392869473
AE801922EB4447__no
2020-02-07T06:00:31GANKL-10
648203097245435392869473
AE801922EB44477Bno


P-1 factor-bounds graph:
B1 = 2200000, B2 = 1908376140 (P-1 stage 2)
B1 = 2200000 (P-1 stage 1)
B1 = 40000, B2 = 310000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
268
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2022-06-19T01:31:00+00:00