Primality proof for n = 3499799:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=1749899.html>1749899 is prime.</a>
<br>b^((n-1)/1749899)-1 mod n = 3, which is a unit, inverse 1166600.
<p>(1749899) divides n-1.
<p>(1749899)^2 > n.
<p>n is prime by Pocklington's theorem.