20210722, 14:48  #408 
Jun 2021
15_{10} Posts 
So I call the stage at which the nfs.dat.p file is filled and the best poly is searched

20210722, 14:59  #409 
Apr 2020
1D3_{16} Posts 
Ah, so by preNFS you really mean the first stage of NFS. I suppose if we're being really strict about the meaning of the word "sieve" then polynomial selection is preNFS and postprocessing is postNFS, but most people use NFS to refer to the whole algorithm rather than just the sieving stage.
I think going straight to GNFS after t50 at this size is suboptimal, but of course everyone's free to do what they want. If you have the resources to do the GNFS yourself, then you also have the resources to do the optimal amount of ECM. 
20210722, 15:35  #410 
Jun 2021
3×5 Posts 

20210722, 16:28  #411 
Apr 2020
467 Posts 
So you ran t50 and then called yafu factor(), which presumably ran at least another t50?

20210722, 17:21  #412 
Jun 2021
3×5 Posts 
I ran yafu work 45 and after completing this stage automatically started preNFS stage for c168 and c169

20210723, 03:11  #413 
Romulan Interpreter
Jun 2011
Thailand
10011000011001_{2} Posts 
You can tune how much ecm yafu will do, by using a "pretest_ratio=..." in yafu.ini file. I usually go with 0.334 (33.4%, which means, for a C168, at least a t55 will be done, and this way have a large chance to avoid a 3way split).

20210723, 07:09  #414 
Aug 2020
5*10398e4;3*2539e3
611_{8} Posts 
Will the data generated here be used in the paper that is currently published at arxiv or will it be part of a new publication? Do you know when it will be submitted?

20210727, 23:16  #415 
I moo ablest echo power!
May 2013
11011111000_{2} Posts 
The C212/SNFS215 for (13,2) factors as:
Code:
p68 factor: 65470839132891587378451398003085663493468996034812587842969753001001 p144 factor: 272999581728907243481927568287887505420486663480088950983800638257617799930179269423084728938601529213529914520447747676995095997912408303807661 
20210729, 10:34  #416  
Jun 2021
F_{16} Posts 
Quote:
In factor.log I see for example Quote:
Last fiddled with by thyrex on 20210729 at 11:06 

20210729, 12:54  #417 
"Ed Hall"
Dec 2009
Adirondack Mtns
3937_{10} Posts 
If I'm reading the table correctly, the following are available for GNFS:
line 123 (9, 7) c168 line 166 (10, 10) c169 line 180 (2, 11) c163 line 183 (5, 11) c162 You may book all available of the four to me. Last fiddled with by EdH on 20210729 at 12:55 
20210729, 13:49  #418 
Jun 2021
3×5 Posts 
I will take soon please
c168 and c169 are free to book Last fiddled with by thyrex on 20210729 at 13:57 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
factoring 2ⁿ2 equivalent to factoring 2ⁿ1(I think)  baih  Miscellaneous Math  9  20200921 07:11 
OpenCL GPU P1 Factoring and ECM Factoring  xx005fs  GPU Computing  3  20181027 14:49 