Primality proof for n = 290064143:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=3739.html>3739 is prime.</a>
<br>b^((n-1)/3739)-1 mod n = 283265731, which is a unit, inverse 25524567.
<p><a href=491.html>491 is prime.</a>
<br>b^((n-1)/491)-1 mod n = 211463535, which is a unit, inverse 48832013.
<p>(491 * 3739) divides n-1.
<p>(491 * 3739)^2 > n.
<p>n is prime by Pocklington's theorem.