Primality proof for n = 29569:
Take b = 3.
b^(n-1) mod n = 1.
11 is prime.
b^((n-1)/11)-1 mod n = 9117, which is a unit, inverse 13638.
7 is prime.
b^((n-1)/7)-1 mod n = 3701, which is a unit, inverse 7582.
3 is prime.
b^((n-1)/3)-1 mod n = 16509, which is a unit, inverse 24065.
(3 * 7 * 11) divides n-1.
(3 * 7 * 11)^2 > n.
n is prime by Pocklington's theorem.