Primality proof for n = 17923:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=103.html>103 is prime.</a>
<br>b^((n-1)/103)-1 mod n = 8786, which is a unit, inverse 1634.
<p><a href=29.html>29 is prime.</a>
<br>b^((n-1)/29)-1 mod n = 5957, which is a unit, inverse 3102.
<p>(29 * 103) divides n-1.
<p>(29 * 103)^2 > n.
<p>n is prime by Pocklington's theorem.