Primality proof for n = 128262069029:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=1687658803.html>1687658803 is prime.</a>
<br>b^((n-1)/1687658803)-1 mod n = 2663518125, which is a unit, inverse 100001539811.
<p>(1687658803) divides n-1.
<p>(1687658803)^2 > n.
<p>n is prime by Pocklington's theorem.