It's not that 4 isn't a valid seed (though insanely unlikely) it's that once I know your values weren't picked randomly because I guessed one of them I can easily figure out the others.

In this case one cert gets defeated and you go the odds of that number being that low are 2^-384. Essentially impossible if it were randomly selected. It's much more likely you didn't choose that at random so I start guessing a bunch of other low numbers for your other certificates and find them quickly.