The book is now available! 40003
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

+ The smallest "extremely naughty" brilliant number, 40003=109*367, i.e., a brilliant number whose all digits are zeros except for the first and last digits. Note that the concatenation in order of its prime factors, i.e., 109367, is an emirp. [Loungrides]

Prime Curios! © 2000-2018 (all rights reserved)  privacy statement