To be fair, 2 is also a very odd prime because it's even.
So many theorems have to say, "for every odd prime..."
https://math.stackexchange.com/questions/1177104/what-is-an-...
So many theorems have to say, "for every odd prime..."
https://math.stackexchange.com/questions/1177104/what-is-an-...
This does hold in the ring Z. In the ring Z[i], 2 = (1+i)*(1-i), and the two factors are prime elements.
"Even" just means "divisible by 2"
"2 is the only prime that is divisible by 2" "3 is the only prime that is divisible by 3" "5 is the only prime that is divisible by 5"
...
"N is the only prime that is divisible by N"