Primality proof for n = 5171:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=47.html>47 is prime.</a>
<br>b^((n-1)/47)-1 mod n = 1253, which is a unit, inverse 2992.
<p><a href=11.html>11 is prime.</a>
<br>b^((n-1)/11)-1 mod n = 645, which is a unit, inverse 3760.
<p>(11 * 47) divides n-1.
<p>(11 * 47)^2 > n.
<p>n is prime by Pocklington's theorem.