Primality proof for n = 5266351:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=83.html>83 is prime.</a>
<br>b^((n-1)/83)-1 mod n = 3188126, which is a unit, inverse 4053108.
<p><a href=47.html>47 is prime.</a>
<br>b^((n-1)/47)-1 mod n = 4912638, which is a unit, inverse 852516.
<p>(47 * 83) divides n-1.
<p>(47 * 83)^2 > n.
<p>n is prime by Pocklington's theorem.