The book is now available! 66
(just those submitted by Murton)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

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

+ 66 is the lowest number that shares a strobogrammatic prime factor with its invertible partner, i.e., 66 and 99 are both divisible by 11. [Murton]




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