Primality proof for n = 5171003929967:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=28859.html>28859 is prime.</a>
<br>b^((n-1)/28859)-1 mod n = 4707046327936, which is a unit, inverse 903777470480.
<p><a href=2281.html>2281 is prime.</a>
<br>b^((n-1)/2281)-1 mod n = 2405770228312, which is a unit, inverse 1408483455690.
<p>(2281 * 28859) divides n-1.
<p>(2281 * 28859)^2 > n.
<p>n is prime by Pocklington's theorem.