Primality proof for n = 25339:
<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 = 21399, which is a unit, inverse 13885.
<p><a href=41.html>41 is prime.</a>
<br>b^((n-1)/41)-1 mod n = 1860, which is a unit, inverse 22628.
<p>(41 * 103) divides n-1.
<p>(41 * 103)^2 > n.
<p>n is prime by Pocklington's theorem.