Primality proof for n = 74551:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=71.html>71 is prime.</a>
<br>b^((n-1)/71)-1 mod n = 13961, which is a unit, inverse 4037.
<p><a href=7.html>7 is prime.</a>
<br>b^((n-1)/7)-1 mod n = 36461, which is a unit, inverse 59952.
<p>(7 * 71) divides n-1.
<p>(7 * 71)^2 > n.
<p>n is prime by Pocklington's theorem.