Primality proof for n = 1300347341:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=3824551.html>3824551 is prime.</a>
<br>b^((n-1)/3824551)-1 mod n = 1098383323, which is a unit, inverse 1281468091.
<p>(3824551) divides n-1.
<p>(3824551)^2 > n.
<p>n is prime by Pocklington's theorem.