Primality proof for n = 72106336199:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=2773320623.html>2773320623 is prime.</a>
<br>b^((n-1)/2773320623)-1 mod n = 67108863, which is a unit, inverse 8149528284.
<p>(2773320623) divides n-1.
<p>(2773320623)^2 > n.
<p>n is prime by Pocklington's theorem.