The book is now available! 37
(just those submitted by Punches)
Prime Curios!
Curios: Curios Search:


Just showing those entries submitted by 'Punches': (Click here to show all)

+ The prime p = 37, and its reversal q = 73, are the only known emirp pair such that p! + 1 and q! + 1 are both primes. [Punches]

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