Primality proof for n = 108261709:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=29387.html>29387 is prime.</a>
<br>b^((n-1)/29387)-1 mod n = 17904350, which is a unit, inverse 13140389.
<p>(29387) divides n-1.
<p>(29387)^2 > n.
<p>n is prime by Pocklington's theorem.