Primality proof for n = 380103483577:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=26889041.html>26889041 is prime.</a>
<br>b^((n-1)/26889041)-1 mod n = 38559691662, which is a unit, inverse 349969380950.
<p>(26889041) divides n-1.
<p>(26889041)^2 > n.
<p>n is prime by Pocklington's theorem.