The book is now available! 305017
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

+ The first three Fermat primes, when concatenated, form a prime. They also form a prime when concatenated backwards. They also form primes when concatenated forwards or backwards with a 0 inserted between each number. [Hartley]

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