Primality proof for n = 900886289:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=27109.html>27109 is prime.</a>
<br>b^((n-1)/27109)-1 mod n = 407331351, which is a unit, inverse 614376904.
<p><a href=67.html>67 is prime.</a>
<br>b^((n-1)/67)-1 mod n = 26234084, which is a unit, inverse 259062632.
<p>(67 * 27109) divides n-1.
<p>(67 * 27109)^2 > n.
<p>n is prime by Pocklington's theorem.