ParadigmShifter
Random Nonsense Generator
That is true! But you are missing an infinite number of other similar rules
Edit: 13 = 2*2 + 3*3 but is not divisible by 3 or 9.
Edit: 13 = 2*2 + 3*3 but is not divisible by 3 or 9.
Mine was only an if divisible by 3 clause, it's nowhere near complete of courseEdit: 13 = 2*2 + 3*3 but is not divisible by 3 or 9.
Countable though, I hopeThat is true! But you are missing an infinite number of other similar rules
edit 2: Restatement:
n is a sum of two squares if and only if either all it's prime factors are sums of squares or it's the square of an integer or twice the square of an integer.