Primality proof for n = 748169:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=2281.html>2281 is prime.</a>
<br>b^((n-1)/2281)-1 mod n = 628215, which is a unit, inverse 53683.
<p>(2281) divides n-1.
<p>(2281)^2 > n.
<p>n is prime by Pocklington's theorem.