Primality proof for n = 90263:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=45131.html>45131 is prime.</a>
<br>b^((n-1)/45131)-1 mod n = 3, which is a unit, inverse 30088.
<p>(45131) divides n-1.
<p>(45131)^2 > n.
<p>n is prime by Pocklington's theorem.