is 2 1740169 - 1
has 523844 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-L0876DE60241629C6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.075368.6567%500000150000000.10155.0379%17.176870.2358%1.5790%
PrimeNet2570.011063.1579%80001400000.00122.7995%0.012264.1893%1.0314%
GPU722610.176565.5738%80001100000.00111.4110%0.177666.0595%0.4858%
Difference+6+16.8988+3.0829%+492000+14890000+0.1004+3.6269%+16.9992+4.1762%+4.1762%

Known prime factors (1 factor, 69.6 bits, 0.00399954% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17401698939293766827249850472169.599256851310614867
32 × 43 × 271 × 2449071871
2014-12-03271244907187176.14610.49619.604

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:43:00Carsten Kossendeyleela950001543750---0.014--2.400%
2014-04-05T13:21:00Jocelyn LaroucheManual testing100000100000---0.008--0.887%
2014-05-06T10:52:00Jocelyn LaroucheManual testing136884136884---0.011--1.059%
2014-09-11T21:44:00Jocelyn LaroucheManual testing173768173768---0.014--1.203%
2014-12-02T21:55:00Jocelyn LaroucheManual testing210652210652---0.017--1.327%
2016-03-16T12:34:10alpertronManual testing5000001500000012---0.101--5.038%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-18T22:56:00Architects Cubedm1_fw260261--0.088--
2010-11-18T02:51:00GrunwalderGIMPManual testing21263--0.917--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.447 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:17.447 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025317.38
50000500000010.069


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-07T00:00:00ANONYMOUSv4_computers0876DE60241629C60.094


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T05:08:09Oliver KruseGTX-1
893929376682724985047
AB31ED066391D9__no
2017-11-03T16:42:19ATHec2-1xf
893929376682724985047
AB31ED066391D9__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 210652 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 173768 (P-1 stage 1)
B1 = 136884 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
263
261
258
250
260
270
280
290
2100
Last modified: 2020-06-15T10:00:24+00:00