Primality proof for n = 1560953:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=4759.html>4759 is prime.</a>
<br>b^((n-1)/4759)-1 mod n = 548174, which is a unit, inverse 386199.
<p>(4759) divides n-1.
<p>(4759)^2 > n.
<p>n is prime by Pocklington's theorem.