Primality proof for n = 14878771:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=495959.html>495959 is prime.</a>
<br>b^((n-1)/495959)-1 mod n = 2470311, which is a unit, inverse 7007573.
<p>(495959) divides n-1.
<p>(495959)^2 > n.
<p>n is prime by Pocklington's theorem.