Pi to a Million Digits

by David E. McAdams

Pi, the ratio of the circumference of a circle to its diameter, has been know to exist for thousands of years. Even before the common era, ancient mathematicians had found approximations for pi that were accurate to two digits (3.1). The Babylonians used 25/8 as an approximation of pi. The ancient Egyptians used 16/9 squared for pi. The next to improve the approximations for pi were Chinese mathematicians. The Chinese approximation was correct to seven digits (3.141592). In Greece, Archimedes used a polygon drawn outside a circle, and a polygon drawn inside a circle, and extended pi to three digits (3.14). Finally, when infinite series were developed, one could calculate pi with pen and paper to as many digits as one had time for. It was not until computers came along that it was practical to calculate pi to a million digits. Here, in this book, are the results.

266 pages, Paperback

Published September 7, 2020

Reviews

[Ahaan Mittal · Rating 5 out of 5]

Fascinating. Every word was captivating, few though there were. McAdams instead made creative use of digits and numbers to convey his story. At a glance, it may simply seem like an excessively accurate approximation of a particularly important irrational number, but beneath the surface it is a heart-wrenching tale of a number who continues on and on, hoping and praying that it can find an end, but knowing deep in its soul that it never will.