Primality proof for n = 2861:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=13.html>13 is prime.</a>
<br>b^((n-1)/13)-1 mod n = 1384, which is a unit, inverse 2338.
<p><a href=11.html>11 is prime.</a>
<br>b^((n-1)/11)-1 mod n = 2367, which is a unit, inverse 1361.
<p>(11 * 13) divides n-1.
<p>(11 * 13)^2 > n.
<p>n is prime by Pocklington's theorem.