Is 1! + 11! + 300! prime?

[zak seidov]

First three prime factors of (1!+11!+300!) are:
2777, 32957, 267569.
What next?
Zak

--- Joseph Biberstine <jrbibers at indiana.edu> wrote:

> AFAICT 2777 is a factor.
> 
> Jonathan Post wrote:
> > Is 1! + 11! + 300! prime? It has 602 digits, and
> the Alpertron calls it
> > "unknown" as to primality after half an hour on my
> Linux box. This is
> > the first such case I've encountered in my A! + B!
> + 1! primality search.
> 
> 


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