Primality proof for n = 4079:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=2039.html>2039 is prime.</a>
<br>b^((n-1)/2039)-1 mod n = 3, which is a unit, inverse 1360.
<p>(2039) divides n-1.
<p>(2039)^2 > n.
<p>n is prime by Pocklington's theorem.