Primality proof for n = 165310801:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=397.html>397 is prime.</a>
<br>b^((n-1)/397)-1 mod n = 49624731, which is a unit, inverse 92192976.
<p><a href=347.html>347 is prime.</a>
<br>b^((n-1)/347)-1 mod n = 128970448, which is a unit, inverse 133210330.
<p>(347 * 397) divides n-1.
<p>(347 * 397)^2 > n.
<p>n is prime by Pocklington's theorem.