Primality proof for n = 324256523:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=162128261.html>162128261 is prime.</a>
<br>b^((n-1)/162128261)-1 mod n = 3, which is a unit, inverse 108085508.
<p>(162128261) divides n-1.
<p>(162128261)^2 > n.
<p>n is prime by Pocklington's theorem.