Primality proof for n = 1285908257:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=33797.html>33797 is prime.</a>
<br>b^((n-1)/33797)-1 mod n = 361465803, which is a unit, inverse 371382902.
<p><a href=41.html>41 is prime.</a>
<br>b^((n-1)/41)-1 mod n = 573106111, which is a unit, inverse 1198157725.
<p>(41 * 33797) divides n-1.
<p>(41 * 33797)^2 > n.
<p>n is prime by Pocklington's theorem.