It's slow, but it works properly. ~30 seconds for 1000 digits on my computer. About four times as long for each time you double the number of digits. Faster on TurboWarp: https://turbowarp.org/991482978?stuck&hqpen *For some reason it keeps freezing up on TurboWarp and won't show progress, but it will eventually unfreeze. I tested it with 10k digits.
When your results finally come, use up and down arrows to scroll through them. Uses pi/4= 12arctan(1/49) +32arctan(1/57) - 5arctan(1/239) +12arctan(1/110443) The later terms calculate faster, especially the last one. I did 10 digits by hand to figure out how the math works, it took 2 sheets of paper and over an hour.
