You can go to this site and download for free the fastest program to calculate Pi. There, you will also see a world RECORD for a number of digits computed so far. The record stands at 13.3 trillion digits, or 1.33 X 10^13 digits. With that same program you can also test the speed of your computer by computing say a 1,000,000 digits of Pi. My computer computes 1,000,000 digits in 1/10 of a second. Here is the link: http://www.numberworld.org/y-cruncher/