Primality proof for n = 372661:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=6211.html>6211 is prime.</a>
<br>b^((n-1)/6211)-1 mod n = 123811, which is a unit, inverse 297097.
<p>(6211) divides n-1.
<p>(6211)^2 > n.
<p>n is prime by Pocklington's theorem.