The book is now available! 7297
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

+ The diagonals of a regular 24-gon intersect at 7297 internal points (6144 intersections of two diagonals, 864 of three, 264 of four, 24 of five, and one intersection of twelve diagonals). [Caldwell]

+ The smallest emirp that remains an emirp when each digit is repeated a number of times equal to its complement: 777222222229777. [Beedassy]

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

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