The book is now available! 74747
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
+ A prime formed from the two first Carol primes in forward and reverse concatenation. (Carol Primes are of the form 4^k-2^(k+1)-1 = (2^x-1)^2-2.) [Silva]

(There is one curio for this number that has not yet been approved by an editor.)




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