Primality proof for n = 47119:

Take b = 2.

b^(n-1) mod n = 1.

7853 is prime.
b^((n-1)/7853)-1 mod n = 63, which is a unit, inverse 28421.

(7853) divides n-1.

(7853)^2 > n.

n is prime by Pocklington's theorem.