Primality proof for n = 9863677:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=881.html>881 is prime.</a>
<br>b^((n-1)/881)-1 mod n = 2183258, which is a unit, inverse 2715823.
<p><a href=311.html>311 is prime.</a>
<br>b^((n-1)/311)-1 mod n = 4477381, which is a unit, inverse 3050820.
<p>(311 * 881) divides n-1.
<p>(311 * 881)^2 > n.
<p>n is prime by Pocklington's theorem.