Primality proof for n = 140977:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=89.html>89 is prime.</a>
<br>b^((n-1)/89)-1 mod n = 71723, which is a unit, inverse 116710.
<p><a href=11.html>11 is prime.</a>
<br>b^((n-1)/11)-1 mod n = 57131, which is a unit, inverse 55309.
<p>(11 * 89) divides n-1.
<p>(11 * 89)^2 > n.
<p>n is prime by Pocklington's theorem.