Primality proof for n = 55799:
Take b = 2.
b^(n-1) mod n = 1.
1213 is prime. b^((n-1)/1213)-1 mod n = 49868, which is a unit, inverse 26493.
(1213) divides n-1.
(1213)^2 > n.
n is prime by Pocklington's theorem.