Primality proof for n = 28430359:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=25339.html>25339 is prime.</a>
<br>b^((n-1)/25339)-1 mod n = 25499506, which is a unit, inverse 332810.
<p>(25339) divides n-1.
<p>(25339)^2 > n.
<p>n is prime by Pocklington's theorem.