This nal project discusses the primality of generalized Fuss-Catalan, Lobb number and ballot number. The generalized Fuss-Catalan Fm(n; k) and Lobb numbers Lm (n;k) are proven prime with m 2 and n; k 1. Then the primality of ballot numbers is proven. The primality of these numbers are proven by direct method. This is a review of paper of Chou et al. [Journal of Integer Sequences, 21 …