The book is now available! 8128
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
+ The largest perfect number whose index is equal to the number of digits. [Pol]

+ The largest perfect number of the form 2^(p-1)*(2^p-1) where the prime number p and the perfect number both have the same index. [Pol]




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