Primality proof for n = 990435552551:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=2245631.html>2245631 is prime.</a>
<br>b^((n-1)/2245631)-1 mod n = 957469282789, which is a unit, inverse 59801225846.
<p>(2245631) divides n-1.
<p>(2245631)^2 > n.
<p>n is prime by Pocklington's theorem.