• On the Value Set of n! Modulo a Prime 

    Banks, William David, 1964-; Luca, Florian; Shparlinski, Igor E.; Stichtenoth, H. (Henning), 1944- (2005)
    We show that for infinitely many prime numbers p there are at least log log p/ log log log p distinct residue classes modulo p that are not congruent to n! for any integer n.