Primality proof for n = 4977439:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=2377.html>2377 is prime.</a>
<br>b^((n-1)/2377)-1 mod n = 3063678, which is a unit, inverse 3401230.
<p>(2377) divides n-1.
<p>(2377)^2 > n.
<p>n is prime by Pocklington's theorem.