A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 123123 is composite.
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The factors of 123123 are: 1, 3, 7, 11, 13, 21, 33, 39, 41, 77, 91, 123, 143, 231, 273, 287, 429, 451, 533, 861, 1001, 1353, 1599, 3003, 3157, 3731, 5863, 9471, 11193, 17589, 41041, 123123
7 is a prime number!
109 is a prime number.
167 is a prime number.
503 is a prime number.