Primality proof for n = 288467:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=6271.html>6271 is prime.</a>
<br>b^((n-1)/6271)-1 mod n = 61076, which is a unit, inverse 100323.
<p>(6271) divides n-1.
<p>(6271)^2 > n.
<p>n is prime by Pocklington's theorem.