From Math Images
The page Talk:Prime spiral (Ulam spiral) was originally created by Abram, on June 9, 2010 at 22:21.
This page was last modified 10:40, 21 July 2010 by Xingda Zhai
. Based on work by D. Abram Lipman
, Anna Phillips
and Stephen B Maurer
and Math Images user(s) Iris