ECM Factoring - Page 4

andi314 · 2003-04-22, 14:55

Hi flava!! :D
Can you email me your newly compiled ecm-program

I'd like to test it for a while. ( I'm using a p4 2000MHz computer/ OS=win98)
Thanks andi314
mailto: mandelbrot@gmx.net

flava · 2003-04-22, 18:01

The program can be downloaded at http://membres.lycos.fr/gmk2000/mersenne/sfx.dat
After you download it, rename it as sfx.exe and launch it (it is a WinRar self extract archive).
The interface is not very friendly but to do ECM's, you enter a "from" and "to" (curves) and the exponent then push the "Ecm" button.
The code is at least two times slower on P4 than on AMD because :
1. it uses integer operations, which are way faster on AMD
2. the gmp lib was compiled for AMD K7

andi314 · 2003-04-23, 14:35

How do I know which parameters i should write into the first and second box????

Thanks andi314

flava · 2003-04-23, 18:05

You don't :D
You can try increasing values (like 1-10, 11-20 ...) or just guess ...

2003-04-22, 14:55	#34
andi314 Nov 2002 2×37 Posts	Hi flava!! :D Can you email me your newly compiled ecm-program I'd like to test it for a while. ( I'm using a p4 2000MHz computer/ OS=win98) Thanks andi314 mailto: mandelbrot@gmx.net

2003-04-22, 18:01	#35
flava Feb 2003 166₈ Posts	The program can be downloaded at http://membres.lycos.fr/gmk2000/mersenne/sfx.dat After you download it, rename it as sfx.exe and launch it (it is a WinRar self extract archive). The interface is not very friendly but to do ECM's, you enter a "from" and "to" (curves) and the exponent then push the "Ecm" button. The code is at least two times slower on P4 than on AMD because : 1. it uses integer operations, which are way faster on AMD 2. the gmp lib was compiled for AMD K7

2003-04-23, 14:35	#36
andi314 Nov 2002 2×37 Posts	How do I know which parameters i should write into the first and second box???? Thanks andi314

2003-04-23, 18:05	#37
flava Feb 2003 2×59 Posts	You don't :D You can try increasing values (like 1-10, 11-20 ...) or just guess ...