Primality proof for n = 65427463921:
<p>Take b = 3.
<p>b^(n-1) mod n = 1.
<p><a href=2995763.html>2995763 is prime.</a>
<br>b^((n-1)/2995763)-1 mod n = 42122182385, which is a unit, inverse 11681146965.
<p>(2995763) divides n-1.
<p>(2995763)^2 > n.
<p>n is prime by Pocklington's theorem.