Running YAFU

[lorgix]

Hi,

I can't get flags to work. I'm assuming that I've missed something fundamental. Probably something that's obvious to people who know at least one programming language.

I don't understand how to do batch work either.

Also, is there a way of changing the behavior of the factor() command? Limits etc..

I'm running yafu-64k-x64 1.21 in Windows 7.

[Karl M Johnson]

My example:
I have a batch file, factor.bat .
If you open it with NotePad, it has the following:

yafu-32k-x64.exe -threads 4 -v -rhomax 800000 -fmtmax 299396627 <factorme.txt
pause

also, I have a file called factorme.txt .
YAFU reads from that file the numbers I want to factor.
Example contents of factorme.txt:

factor(999999999999999999999999999999999999999999999999999999999999999999999999999999839999999999999999999999999999999999999999999999999999999999999999999999999999997751)
siqs(1057409760389727179215648843128435820215732534244928446740953737668146356315982185550002262405690920105297)

Everything about the keys(-threads , -rhomax) is documented in YAFU docfile.The commands( siqs(), factor() ) are also there.

[lorgix]

Thanks.

I think I've created a correct work file and a correct .bat.

It appears the only problem left is that I still don't know how to tell YAFU to get to work.

I have 'ecm.txt' and 'factor.bat', what do I type in YAFU?

[Karl M Johnson]

Well, you can type the same stuff as in your ecm.txt , but, better yet, launch the batch file.

For example, you launch yafu, a console window appears, and you type ecm(*some number*) and press Enter, and that will "tell" yafu to ECM that number.
If you have "ecm (*some number*) in ecm.txt, you can just edit your factor.bat, so it will have "yafu.exe <ecm.txt".
Each time you launch that batch file, it will do ECM factoring on the number in ecm.txt.

[lorgix]

Originally Posted by Karl M Johnson

Well, you can type the same stuff as in your ecm.txt , but, better yet, launch the batch file.

For example, you launch yafu, a console window appears, and you type ecm(*some number*) and press Enter, and that will "tell" yafu to ECM that number.
If you have "ecm (*some number*) in ecm.txt, you can just edit your factor.bat, so it will have "yafu.exe <ecm.txt".
Each time you launch that batch file, it will do ECM factoring on the number in ecm.txt.

Ok, I understand all of that. The only problem is that apparently I don't know how to "launch a file in YAFU".

[bsquared]

Originally Posted by lorgix

Ok, I understand all of that. The only problem is that apparently I don't know how to "launch a file in YAFU".

yafu supports many different modes of interaction.

Some examples:

from a command line type

yafu-64k-x64

and you'll get a command prompt from which you can enter commands like siqs(*number*) or ecm(*number*,*num_curves*)

from a command line type

yafu-64k-x64 "siqs(*number*)"

or

yafu-64k-x64 "ecm(*number*,*num_curves*)"

and the program will do the same thing, but without the command prompt.

expanding on this theme, from a command line type

 yafu-64k-x64 -batchfile filename

and the program will process every line in the batchfile one at a time (lines in the batchfile should be statements such as siqs(*number*), etc.).

Or you could use redirection, as Karl is doing.

There are many other flags you can optionally add after the command (siqs(), ecm(), etc), such as -v, -threads, or options to control the ecm,p +/- 1 bounds, and so forth. these are documented in docfile.txt.

yafu-64k-x64 "siqs(*number*)" -v -threads 4 -rhomax 1000000

or Karl's example with redirection.

Hope this helps.

[Dubslow]

Issuing the command 'help funcname' will bring up more detailed help
on a particular function.

Type help at any time, or quit to quit

>> help primes

searching for help on 'primes'
>> help prime

searching for help on 'prime'
>> help factor

searching for help on 'factor'
>> help

searching for help on 'help'
>>

I don't understand where exactly to find the help. Downloaded a few hours ago, v1.30.

[bsquared]

Originally Posted by Dubslow

Issuing the command 'help funcname' will bring up more detailed help
on a particular function.

Type help at any time, or quit to quit

>> help primes

searching for help on 'primes'
>> help prime

searching for help on 'prime'
>> help factor

searching for help on 'factor'
>> help

searching for help on 'help'
>>

I don't understand where exactly to find the help. Downloaded a few hours ago, v1.30.

I noticed years ago this was the case in the linux version and I never fixed it (it works fine in Windows...). I've wondered how long it would take for someone to notice :)

All it does is print the relevant section in docfile.txt, which should have been packaged in the download file. Open it in your favorite text editor and search for the term you want.

[Dubslow]

Originally Posted by bsquared

I noticed years ago this was the case in the linux version and I never fixed it (it works fine in Windows...). I've wondered how long it would take for someone to notice :)

All it does is print the relevant section in docfile.txt, which should have been packaged in the download file. Open it in your favorite text editor and search for the term you want.

Thanks.

Edit: Something else that I couldn't figure out what was wrong:

-pscreen			Adding this flag causes the primes() function to output primes 
				to the screen

bill@Gravemind:~/yafu∰∂ yafu -pscreen primes()
bash: syntax error near unexpected token `('
bill@Gravemind:~/yafu∰∂ yafu -pscreen primes(200)
bash: syntax error near unexpected token `('
bill@Gravemind:~/yafu∰∂ yafu -pscreen "primes(200)"
no switch detected
bill@Gravemind:~/yafu∰∂ yafu -pscreen "primes()"
no switch detected
bill@Gravemind:~/yafu∰∂ yafu "primes()"


invalid character in str2hexz
not enough arguments, please specify min and max of range

ans = 0

bill@Gravemind:~/yafu∰∂ yafu "primes(1,1000)"


elapsed time = 0.0030

ans = 168

bill@Gravemind:~/yafu∰∂ yafu -pscreen "primes(1,1000)"
no switch detected
bill@Gravemind:~/yafu∰∂ yafu "primes(1,1000) -pscreen"


unrecognized token: pscreen
bill@Gravemind:~/yafu∰∂ yafu "primes(1,1000)" -pscreen


elapsed time = 0.0030

ans = 168

bill@Gravemind:~/yafu∰∂ yafu


03/27/12 19:36:01 v1.30 @ Gravemind, System/Build Info: 
Using GMP-ECM 6.3, Powered by GMP 5.0.1
detected        Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz
detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes
measured cpu frequency ~= 3494.445730

===============================================================
======= Welcome to YAFU (Yet Another Factoring Utility) =======
=======             bbuhrow@gmail.com                   =======
=======     Type help at any time, or quit to quit      =======
===============================================================
cached 78498 primes. pmax = 999983


>> primes(1,1000) -pscreen

unrecognized token: pscreen
>> primes(1,1000)     

elapsed time = 0.0031

ans = 168

>> help primes

searching for help on 'primes'
>> primes help 

searching for help on 'es help'
>> help

searching for help on 'help'
>> quit

bill@Gravemind:~/yafu∰∂ yafu help primes
no switch detected

And after that it devolved to me trying to figure out how to get help working. How can I print primes to screen?

[bsquared]

Originally Posted by Dubslow

How can I print primes to screen?

yafu "primes(0,1000,0)" -pscreen

Generally, the command needs to come first followed by options. And you need the second "0" to tell the primes function to actually compute the primes instead of just count them (the default). I know, I know, it should see -pscreen and know that it needs to compute the primes... just one of the quirks of the program :)