The book is now available! 10838689
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
+ Any 21-digit number that has any set of 3 digits repeating 7 times (abcabcabcabcabcabcabc) or any set of 7 digits repeating 3 times (abcdefgabcdefgabcdefg) including any 21-digit repdigit has 10838689 as a highest prime factor. [Schuler]




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