conditional - How to avoid applying Cross to a single argument?

I am looking for the simplest way to avoid applying Cross to a single argument.

PrimeFactorization[x_] := Cross @@ (Superscript @@@ FactorInteger[x]);
Table[{n, PrimeFactorization[n]}, {n, 200, 250}] // TableForm

Answer

Since you already use Cross in a way that it's not meant to be used, you can also redefine it and assign a meaning to it when it has only a single argument:

Unprotect[Cross]; 

Cross[x_] := x;

A bit less severe: Define your own function.

cross[x__] := Cross[x];
cross[x_] := x;