## Good Prime

A Prime is called good'' if

for all (there is a typo in Guy 1994 in which the s are replaced by 1s). There are infinitely many good primes, and the first few are 5, 11, 17, 29, 37, 41, 53, ... (Sloane's A028388).

Guy, R. K. Good' Primes and the Prime Number Graph.'' §A14 in Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, pp. 32-33, 1994.