is 2 1708229 - 1
has 514229 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-LEFA1A478F15ECF42double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.394668.6567%500000150000000.08805.0267%17.482670.2322%1.5755%
PrimeNet2570.011263.1579%80001400000.00102.7897%0.012364.1857%1.0278%
GPU722610.179865.5738%70001000000.00081.3027%0.180666.0222%0.4485%
Difference+6+17.2148+3.0829%+493000+14900000+0.0872+3.7240%+17.3020+4.2100%+4.2100%

Known prime factors (1 factor, 66.6 bits, 0.00389977% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17082291131711809789244698872166.61733125295548467
2293 × 14446269319
2008-06-2722931444626931912.52253.710100.32

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:29:59alpertronManual testing5000001500000012---0.088--5.027%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
1998-12-06T00:00:00ANONYMOUSv4_computers21257--0.011--
1998-12-13T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--


ECM factoring results:

Old Calculation Method

Total ECM effort:15.938 GHz-days
Estimated T-Level:24.786
DigitsB1CurvesCompleteFacMiss
2011000268 / 1002.6806.764%
2550000268 / 2800.95738.333%

New Calculation Method

Total ECM effort:15.938 GHz-days
Estimated T-Level:24.786
DigitsB1CompleteFacMiss
201100010.3080.003%
25500000.95438.530%
302500000.06094.162%
3510000000.00399.719%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000026815.94


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computersEFA1A478F15ECF420.080
2000-04-27T00:00:00ANONYMOUSv4_computersEFA1A478F15ECF420.080


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:19alpertronManual testing
113171180978924469887
625B72A4775541__no
2017-10-18T21:17:51Oliver KruseGTX-1
113171180978924469887
625B72A4775541__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
258
257
250
260
270
280
290
2100
Last modified: 2020-03-30T08:12:05+00:00