The book is now available! 5437
(just those submitted by Madachy)
Prime Curios!
Curios: Curios Search:


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

+ The center prime in a 13-by-13 bordered magic square made solely of prime numbers by a man in jail. [Madachy]

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