Primality proof for n = 87433:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=3643.html>3643 is prime.</a>
<br>b^((n-1)/3643)-1 mod n = 77512, which is a unit, inverse 48286.
<p>(3643) divides n-1.
<p>(3643)^2 > n.
<p>n is prime by Pocklington's theorem.