The smallest solution to the famous puzzle that first appeared in Ben Ames Williams's "Coconuts" from The Saturday Evening Post (October 9, 1926). [Poo Sung]
The smallest emirp equal the form p^p-q^q, where p, q are
primes (case p=5, q=2). [Loungrides]
To link to this page use http://primes.utm.edu/curios/page.php?number_id=2796