Primality proof for n = 5071793:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=28817.html>28817 is prime.</a>
<br>b^((n-1)/28817)-1 mod n = 1529467, which is a unit, inverse 1101785.
<p>(28817) divides n-1.
<p>(28817)^2 > n.
<p>n is prime by Pocklington's theorem.