neil@bungo:/usbdisk/pi_css5_src$ ./pi_css5
Calculation of PI using FFT and AGM, ver. LG1.1.2-MP1.5.2a.memsave
Usage: ./pi_css5 digits
Number of digits of pi to calculate?
100000
initializing...
nfft= 32768
radix= 10000
error_margin= 0.000620286
calculating 131072 digits of PI...
AGM iteration
precision= 48: 2.23 sec
precision= 80: 2.23 sec
precision= 176: 2.23 sec
precision= 352: 2.23 sec
precision= 688: 2.23 sec
precision= 1392: 2.23 sec
precision= 2784: 2.23 sec
precision= 5584: 2.23 sec
precision= 11168: 2.23 sec
precision= 22336: 2.23 sec
precision= 44688: 2.23 sec
precision= 89408: 2.23 sec
precision= 178816: 2.23 sec
writing pi131072.txt...
34.97 sec. (real time)
Hit RETURN to exit.
neil@bungo:/usbdisk/pi_css5_src$ cat pi131072.txt
3.
1415926535 8979323846 2643383279 5028841971 6939937510
<snip>
So, there you have it. Pi to ~100000 digits in 35ish seconds calculated on a plug.
Not sure exactly why I felt the urge to do this.
