Primality proof for n = 162128261:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=165437.html>165437 is prime.</a>
<br>b^((n-1)/165437)-1 mod n = 98455886, which is a unit, inverse 139214439.
<p>(165437) divides n-1.
<p>(165437)^2 > n.
<p>n is prime by Pocklington's theorem.