The book is now available! 49689...15327 (7465-digits)
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
+ 2327*2^24786-1 is prime. Note that the digits of 2327 and 2327^2 = 5414929 both alternate in parity. Also, 24786 is a right-truncatable Harshad number. [Earls]




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