This is the number you get when you plug one into 
This is the number you get when you plug one into the formula from Heawood's Conjecture, so this number is the upper bound on the minimum number of colors needed to color a torus. It is the smallest number which cannot be expressed as the sum of (*) three squares, and this is the number of Millenium Prize Problems. Like three, this number forms a twin prime pair with five. For ten points, give this number, equal to three plus four.
This is the number you get when you plug one into the formula from Heawood's Conjecture, so this number is the upper bound on the minimum number of colors needed to color a torus.
{seven}