Primality proof for n = 74050321:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=269.html>269 is prime.</a>
<br>b^((n-1)/269)-1 mod n = 9879702, which is a unit, inverse 20740614.
<p><a href=37.html>37 is prime.</a>
<br>b^((n-1)/37)-1 mod n = 32266437, which is a unit, inverse 20400376.
<p>(37 * 269) divides n-1.
<p>(37 * 269)^2 > n.
<p>n is prime by Pocklington's theorem.