Primality proof for n = 988937:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=257.html>257 is prime.</a>
<br>b^((n-1)/257)-1 mod n = 748577, which is a unit, inverse 339656.
<p><a href=37.html>37 is prime.</a>
<br>b^((n-1)/37)-1 mod n = 966520, which is a unit, inverse 486638.
<p>(37 * 257) divides n-1.
<p>(37 * 257)^2 > n.
<p>n is prime by Pocklington's theorem.