Primality proof for n = 9187:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=1531.html>1531 is prime.</a>
<br>b^((n-1)/1531)-1 mod n = 63, which is a unit, inverse 3354.
<p>(1531) divides n-1.
<p>(1531)^2 > n.
<p>n is prime by Pocklington's theorem.