Bailey–Borwein–Plouffe formula
lastmod 2026-11-10created 2021-07-232 edits
Bailey–Borwein–Plouffe formula (BBP formula) is a formula that expresses pi (π) as a series. Its distinguishing feature is the digit extraction property, which lets you compute the nth hexadecimal digit directly without calculating all the preceding digits, and for this reason it has been used in record computations of specific digits of π. It is classified as a type of spigot algorithm, which extracts digits one after another.