Composite Number:  As at least 3 factors (or at least 2 prime factors and 1)
 

Composites Examples:

                                     8  = 1 x 2 x 2 x 2 ( factors = {1, 2, 4, 8} )
                                     6  = 1 x 2 x 3       ( factors = {1, 2, 3, 6} )
                                    15 = 1 x 3 x 5       ( factors = {1, 3, 5, 15} )