Primality proof for n = 8199883:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=211.html>211 is prime.</a>
<br>b^((n-1)/211)-1 mod n = 6678338, which is a unit, inverse 5217736.
<p><a href=127.html>127 is prime.</a>
<br>b^((n-1)/127)-1 mod n = 5058040, which is a unit, inverse 1319579.
<p>(127 * 211) divides n-1.
<p>(127 * 211)^2 > n.
<p>n is prime by Pocklington's theorem.