Adding to prime number
What elementary principle of algebra allows us to know almost instantly that the following calculated integers are prime? Note; 2^2 = 2*2 = 4; 2^3 = 2 * 2 * 2 = 8; etc. 2+3, 2^2 + 3 2^3 + 3 2^4 + 3 2 + 3^2 2^2 + 3^2 2^3 + 3^2 2*3 + 5 2*5 + 3 3*5 + 2 2^2 * 3 + 5 2^3 * 3 + 5 2 * 3^2 + 5 2^2 * 3^2 + 5 Sign in to see full entry.