Primality proof for n = 12672138976649:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=1584017372081.html>1584017372081 is prime.</a>
<br>b^((n-1)/1584017372081)-1 mod n = 255, which is a unit, inverse 9740153880091.
<p>(1584017372081) divides n-1.
<p>(1584017372081)^2 > n.
<p>n is prime by Pocklington's theorem.