Primality proof for n = 21464983:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=911.html>911 is prime.</a>
<br>b^((n-1)/911)-1 mod n = 16404668, which is a unit, inverse 18755503.
<p><a href=17.html>17 is prime.</a>
<br>b^((n-1)/17)-1 mod n = 12284545, which is a unit, inverse 15400954.
<p>(17 * 911) divides n-1.
<p>(17 * 911)^2 > n.
<p>n is prime by Pocklington's theorem.