Primality proof for n = 43936391:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=118747.html>118747 is prime.</a>
<br>b^((n-1)/118747)-1 mod n = 10165600, which is a unit, inverse 13352110.
<p>(118747) divides n-1.
<p>(118747)^2 > n.
<p>n is prime by Pocklington's theorem.