Primality proof for n = 28597:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=2383.html>2383 is prime.</a>
<br>b^((n-1)/2383)-1 mod n = 4095, which is a unit, inverse 3785.
<p>(2383) divides n-1.
<p>(2383)^2 > n.
<p>n is prime by Pocklington's theorem.