Primality proof for n = 599:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=23.html>23 is prime.</a>
<br>b^((n-1)/23)-1 mod n = 497, which is a unit, inverse 276.
<p><a href=13.html>13 is prime.</a>
<br>b^((n-1)/13)-1 mod n = 18, which is a unit, inverse 233.
<p>(13 * 23) divides n-1.
<p>(13 * 23)^2 > n.
<p>n is prime by Pocklington's theorem.