Primality proof for n = 8741:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=23.html>23 is prime.</a>
<br>b^((n-1)/23)-1 mod n = 1991, which is a unit, inverse 8561.
<p><a href=19.html>19 is prime.</a>
<br>b^((n-1)/19)-1 mod n = 7295, which is a unit, inverse 538.
<p>(19 * 23) divides n-1.
<p>(19 * 23)^2 > n.
<p>n is prime by Pocklington's theorem.