Primality proof for n = 213095137:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=3529.html>3529 is prime.</a>
<br>b^((n-1)/3529)-1 mod n = 35019268, which is a unit, inverse 17407833.
<p><a href=37.html>37 is prime.</a>
<br>b^((n-1)/37)-1 mod n = 206800799, which is a unit, inverse 142562166.
<p>(37 * 3529) divides n-1.
<p>(37 * 3529)^2 > n.
<p>n is prime by Pocklington's theorem.