The book is now available! 6517
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
+ The sum of digits of 6517 = 7^3 * 19 equals its largest prime factor. Both 6^4 + 5^3 + 1^2 + 7^1 and 6! + 5! + 1! + 7! are also primes. [Post]




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