Primality proof for n = 73043:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=619.html>619 is prime.</a>
<br>b^((n-1)/619)-1 mod n = 12762, which is a unit, inverse 56050.
<p>(619) divides n-1.
<p>(619)^2 > n.
<p>n is prime by Pocklington's theorem.