While digging into some of the old TI PPC Notes PDFs I have to figure out why the TI CC40 matrix routines weren't working that I was writing (what? you don't have copies? You should all have copies of the PPC Journal competitor...you just never know when they might be of use! See ** below :-), I came across another TI speed test that caught my eye.

You remember the types of problems people used to do:

* Calculate 1000 digits of PI as fast as you can.

* Factor 9999999997 as fast as you can

etc.

This was to calculate EXACT factorials as fast as possible. A program to compute exact factorials in FAST MODE on the TI59 was presented in V8N5P5. Results?

It computed the exact factorial of 610 in 7 hours and 29 minutes.

I pulled out my trusty HP49g+ in exact mode and using << 610 ! >> TEVAL got 9.0956 seconds.

Then I pulled out my Tungsten C (400Mhz X-scale) running Power48, and on the HP49 emulation in exact mode did the same thing.

Time? 2.3901 seconds.

Wow. The HP49g+ is nearly 2962 times faster than the old TI--59 program and my Tungsten C running the HP49 emulator is nearly 11272 times faster.

What a world we live in 22 years later.

Gene

** These are available on Viktor Toth's web site and on the HHC2004 conference CD.