how to calculate pi?

ARGINITE

What would be the best and easiest way to calculate pi to a very large number like super pi but to more places of decimal?

gerire

Title: Super PI Ver1.1e (calculation of pi up to 33.55 million digits)
Keywords: PI MATH WINDOWS
In August 1995, the calculation of pi up to 4,294,960,000 decimal digits was succeeded by using a supercomputer at the University of Tokyo. The program was written by D.Takahashi and he collaborated with Dr. Y.Kanada at the computer center, the University of Tokyo. This record should be the current world record. ( Details is shown in the windows help. ) This record-breaking program was ported to personal computer environment such as Windows NT and Windows 95. In order to calculate 33.55 million digits, it takes within 3 days with Pentium 90MHz, 40MB main memory and 340MB available storage.
The software is free and the circulation of program is also free!

Should be a bit quicker than 3 days looking at the specs of the machines they were using back then


zip file here: http://pw1.netcom.com/~hjsmith/Pi/Super_Pi.html

<edit> it took my 1 year old box 1min 5 secs to do 19 itterations </edit>

ARGINITE

thanks
But what im actually looking for is how they worked out the algorithm that they used and the easiest way for me to do something like that.
i just want to write my own super pi program.