Primality proof for n = 16879:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=97.html>97 is prime.</a>
<br>b^((n-1)/97)-1 mod n = 7200, which is a unit, inverse 13318.
<p><a href=29.html>29 is prime.</a>
<br>b^((n-1)/29)-1 mod n = 5093, which is a unit, inverse 5876.
<p>(29 * 97) divides n-1.
<p>(29 * 97)^2 > n.
<p>n is prime by Pocklington's theorem.