Primality proof for n = 2879:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=1439.html>1439 is prime.</a>
<br>b^((n-1)/1439)-1 mod n = 3, which is a unit, inverse 960.
<p>(1439) divides n-1.
<p>(1439)^2 > n.
<p>n is prime by Pocklington's theorem.