Primality proof for n = 6153491:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=5171.html>5171 is prime.</a>
<br>b^((n-1)/5171)-1 mod n = 3624545, which is a unit, inverse 4104544.
<p>(5171) divides n-1.
<p>(5171)^2 > n.
<p>n is prime by Pocklington's theorem.