Primality proof for n = 57660685428664091:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=757986407.html>757986407 is prime.</a>
<br>b^((n-1)/757986407)-1 mod n = 2694799310712198, which is a unit, inverse 28666511356537955.
<p>(757986407) divides n-1.
<p>(757986407)^2 > n.
<p>n is prime by Pocklington's theorem.