Primality proof for n = 37591:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=179.html>179 is prime.</a>
<br>b^((n-1)/179)-1 mod n = 4893, which is a unit, inverse 1767.
<p><a href=7.html>7 is prime.</a>
<br>b^((n-1)/7)-1 mod n = 5159, which is a unit, inverse 12081.
<p>(7 * 179) divides n-1.
<p>(7 * 179)^2 > n.
<p>n is prime by Pocklington's theorem.