Primality proof for n = 3086977169:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=19211.html>19211 is prime.</a>
<br>b^((n-1)/19211)-1 mod n = 2446132186, which is a unit, inverse 1684996232.
<p><a href=83.html>83 is prime.</a>
<br>b^((n-1)/83)-1 mod n = 1975856084, which is a unit, inverse 1992305034.
<p>(83 * 19211) divides n-1.
<p>(83 * 19211)^2 > n.
<p>n is prime by Pocklington's theorem.