Primality proof for n = 11760675247:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=653370847.html>653370847 is prime.</a>
<br>b^((n-1)/653370847)-1 mod n = 262143, which is a unit, inverse 9754285916.
<p>(653370847) divides n-1.
<p>(653370847)^2 > n.
<p>n is prime by Pocklington's theorem.