The book is now available! 111829
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
+ The first emirp formed by concatenating S, P, n, where S and P are the sum and the product of the digits of a multidigit number n. [Loungrides]




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