Primality proof for n = 2707339:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=691.html>691 is prime.</a>
<br>b^((n-1)/691)-1 mod n = 551432, which is a unit, inverse 1779950.
<p><a href=653.html>653 is prime.</a>
<br>b^((n-1)/653)-1 mod n = 1340424, which is a unit, inverse 683401.
<p>(653 * 691) divides n-1.
<p>(653 * 691)^2 > n.
<p>n is prime by Pocklington's theorem.