You should read the article you posted before you write a comment. Hint: check P_F=0 in tables 2, 3 and 4.
"Factored" is doing a lot of lifting here and is borderline deceptive. Plenty of researchers have long ago pointed out that this won't scale, see M Mosca for reference.
I'm aware; I don't think gate model machines have demonstrated much potential of scaling in practice any time soon so this is more of a lark to show how unimpressive the current Shor's attempts have been
