Primality proof for n = 297191:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=263.html>263 is prime.</a>
<br>b^((n-1)/263)-1 mod n = 209813, which is a unit, inverse 255618.
<p><a href=113.html>113 is prime.</a>
<br>b^((n-1)/113)-1 mod n = 141423, which is a unit, inverse 1906.
<p>(113 * 263) divides n-1.
<p>(113 * 263)^2 > n.
<p>n is prime by Pocklington's theorem.