Primality proof for n = 241601:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=151.html>151 is prime.</a>
<br>b^((n-1)/151)-1 mod n = 82141, which is a unit, inverse 230027.
<p><a href=5.html>5 is prime.</a>
<br>b^((n-1)/5)-1 mod n = 61938, which is a unit, inverse 19757.
<p>(5^2 * 151) divides n-1.
<p>(5^2 * 151)^2 > n.
<p>n is prime by Pocklington's theorem.