is 2 1739009 - 1
has 523494 decimal digits
takes 0.094 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L57CC3359419CD1AEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.086768.6567%500000150000000.10155.0375%17.188270.2356%1.5789%
PrimeNet2570.011063.1579%80001400000.00122.7991%0.012264.1892%1.0313%
GPU722610.176665.5738%80001100000.00111.4108%0.177766.0595%0.4857%
Difference+6+16.9101+3.0829%+492000+14890000+0.1004+3.6267%+17.0105+4.1762%+4.1762%

Known prime factors (1 factor, 73.5 bits, 0.00422754% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1739009135174782173982916217672373.5173886546365601987
59 × 13613 × 4839026461
2009-06-211361348390264611,487.420.74038.734

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:34:03alpertronManual testing5000001500000012---0.101--5.038%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.720 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:17.720 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110009.9230.005%
25500000.91839.926%
302500000.05894.373%
3510000000.00399.730%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025817.72


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06T00:00:00ANONYMOUSv4_computers57CC3359419CD1AE0.094
1998-12-21T00:00:00ANONYMOUSv4_computers57CC3359419CD1AE0.094


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:16:30alpertronManual testing
13517478217398291621767
4380932BB25DD9__no
2017-10-19T12:28:00Oliver KruseThreadripper
13517478217398291621767
4380932BB25DD9__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2020-06-08T08:21:37+00:00