The book is now available! 22059819805104914321
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
                                                       2205981980 5104914321
+ Prime basenumber p of a palindromic heptagonal of length 40 {p(5p - 3)/2 = 1216589124584247550110557424854219856121}. [De Geest]




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