Primality proof for n = 492167257:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=7649.html>7649 is prime.</a>
<br>b^((n-1)/7649)-1 mod n = 336649638, which is a unit, inverse 354522845.
<p><a href=383.html>383 is prime.</a>
<br>b^((n-1)/383)-1 mod n = 168613394, which is a unit, inverse 184765166.
<p>(383 * 7649) divides n-1.
<p>(383 * 7649)^2 > n.
<p>n is prime by Pocklington's theorem.