Classify the following numbers as 'prime' or 'composite' - 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16.
'prime', 'prime', 'composite', 'prime', 'composite', 'prime', 'composite', 'composite', 'composite', 'prime', 'composite', 'prime', 'composite', 'composite', 'composite'.