Primality proof for n = 4723:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=787.html>787 is prime.</a>
<br>b^((n-1)/787)-1 mod n = 63, which is a unit, inverse 2399.
<p>(787) divides n-1.
<p>(787)^2 > n.
<p>n is prime by Pocklington's theorem.