Primality proof for n = 87559:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=14593.html>14593 is prime.</a>
<br>b^((n-1)/14593)-1 mod n = 63, which is a unit, inverse 31966.
<p>(14593) divides n-1.
<p>(14593)^2 > n.
<p>n is prime by Pocklington's theorem.