Primality proof for n = 17543087:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=887.html>887 is prime.</a>
<br>b^((n-1)/887)-1 mod n = 14737264, which is a unit, inverse 14758262.
<p><a href=31.html>31 is prime.</a>
<br>b^((n-1)/31)-1 mod n = 1070548, which is a unit, inverse 8990261.
<p>(31 * 887) divides n-1.
<p>(31 * 887)^2 > n.
<p>n is prime by Pocklington's theorem.