Primality proof for n = 176039071423:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=196911713.html>196911713 is prime.</a>
<br>b^((n-1)/196911713)-1 mod n = 77119920111, which is a unit, inverse 17159239061.
<p>(196911713) divides n-1.
<p>(196911713)^2 > n.
<p>n is prime by Pocklington's theorem.