Primality proof for n = 671165898617413417:
<p>Take b = 3.
<p>b^(n-1) mod n = 1.
<p><a href=1325514287.html>1325514287 is prime.</a>
<br>b^((n-1)/1325514287)-1 mod n = 360058255460107342, which is a unit, inverse 633624280482534409.
<p>(1325514287) divides n-1.
<p>(1325514287)^2 > n.
<p>n is prime by Pocklington's theorem.