The factors of 11 are 1 and 11. As 1 ×11 is 11 and 11 × 1 is also 11. The number 11 is a prime number. A prime number is one that has only two factors, 1 and the number itself.
I'm guessing that the >= is a greater than or equal to sign, so the answer should be d>=2 and d<2, please tell me if I am wrong and I will do my best to correct it!
