Primality proof for n = 139862065649:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=380059961.html>380059961 is prime.</a>
<br>b^((n-1)/380059961)-1 mod n = 47456737026, which is a unit, inverse 56245882722.
<p>(380059961) divides n-1.
<p>(380059961)^2 > n.
<p>n is prime by Pocklington's theorem.