Primality proof for n = 139759026803824079:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=3286873.html>3286873 is prime.</a>
<br>b^((n-1)/3286873)-1 mod n = 74018298784106547, which is a unit, inverse 94099312063304057.
<p><a href=6131.html>6131 is prime.</a>
<br>b^((n-1)/6131)-1 mod n = 74639927714532779, which is a unit, inverse 41996677652238246.
<p>(6131 * 3286873) divides n-1.
<p>(6131 * 3286873)^2 > n.
<p>n is prime by Pocklington's theorem.