I'd guess the GP was pointing out that there are uninteresting results that those less qualified in maths see as some sort of magic. Maybe like those silly "choose any number multiply by x, etc etc did you get 7, magic!" games. Or:

    9*9+7 = 88
    98*9+6 = 888
    987*9+5 = 8888

While not exactly trivial, and there's still maths required to understand the patterns, this prime result is much deeper and more interesting. The GP almost passed over it because they though it might fall into the less interesting category.