Gerson's Pi Program

[Gerson W. Barbosa]

(03-04-2022 04:50 PM)EdS2 Wrote:  With your changes, my suboptimal port produces the 12 correct digits as it should, in 53 seconds.

For reference, my simplistic and inefficient port of Katie's program produced 92 correct digits in 71 seconds.

As stated earlier, the WWF is not intended to be fast. According to an article by the Borwein Brothers in Scientific American (February 1988), not even 100 years of computing on a supercomputer programmed to evaluate the Wallis Product or the Gregory’s Series would yield 100 digits of π. So, getting 100 digits in 100 minutes on an 8-bit personal computer of that era using the Wallis Product as a basis is an unexpected surprise.