Primality proof for n = 6051631:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=263.html>263 is prime.</a>
<br>b^((n-1)/263)-1 mod n = 3483354, which is a unit, inverse 865403.
<p><a href=59.html>59 is prime.</a>
<br>b^((n-1)/59)-1 mod n = 5588904, which is a unit, inverse 2321130.
<p>(59 * 263) divides n-1.
<p>(59 * 263)^2 > n.
<p>n is prime by Pocklington's theorem.