The book is now available! 239
(just those submitted by Caldwell)
Prime Curios!
Curios: Curios Search:


Just showing those entries submitted by 'Caldwell': (Click here to show all)

+ Arctan(1/239) in degrees begins 0.239..., and this is the only positive integer for which this is true. [Wu and Caldwell]

Prime Curios! © 2000-2018 (all rights reserved)