Primality proof for n = 13943143:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=26711.html>26711 is prime.</a>
<br>b^((n-1)/26711)-1 mod n = 6309612, which is a unit, inverse 2025555.
<p>(26711) divides n-1.
<p>(26711)^2 > n.
<p>n is prime by Pocklington's theorem.