Pi

by Scott Hemphill

I computed the digits of pi using Borwein's method.  I used a
divide-and-conquer multiply routine, hand coded in 68020 assembly
language.  It was capable of multiplying two 1.25+ million digit
numbers in about 20 minutes on an HP 9000/370 (a 25MHz 68030?).
The computation took a little over three days, at which point I had
the answer in *binary*. :-(  The binary to decimal conversion was
no simple task.

I checked my results by performing the same calculation to 2.5+
million digit precision, (9 days) and compared the binaries.  The
only independent check has come from David Bailey, whose results
agree with mine to at least 1 million digits (probably....  The
last 100 digits are the same.)

767 pages, Kindle Edition

First published October 4, 2009

Reviews

[Jon Papai · Rating 3 out of 5]

3.14159 stars

[Susan Molloy · Rating 3 out of 5]

✒️ Reading this was gripping, suspenseful, the twist two-thirds in made me laugh, and the dénouement was shocking. It was worthwhile.

📕In the public domain.

જ⁀🟢Read e-book on ρ𝕣ꪮ𝕛ꫀᥴ𝕥 ᧁꪊ𝕥ꫀꪀ᥇ꫀ𝕣ᧁ.
જ⁀🟣 Kindle.
༺༻༺༻✬༺༻༺༻༺༻༺༻✬༺༻༺༻