Primality proof for n = 13843970897:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=123606883.html>123606883 is prime.</a>
<br>b^((n-1)/123606883)-1 mod n = 11497946632, which is a unit, inverse 6609093613.
<p>(123606883) divides n-1.
<p>(123606883)^2 > n.
<p>n is prime by Pocklington's theorem.