The book is now available! 218
(just those submitted by Pfannerer)
Prime Curios!
Curios: Curios Search:


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

+ 218 = 72 + 132. Note that 7 and 13 are the smallest primes for which there is no easy divisibility check in base 10. [Pfannerer]

Prime Curios! © 2000-2017 (all rights reserved)