1 HARD Lewis found the prime factorization of a number. It was: 2 $$\times$$ 2 $$\times$$ 3 $$\times$$ 5 $$\times$$ 5 $$\times$$ 7. What number was he factoring?

 2 HARD What is the prime factorization of 396?

 3 HARD What is the prime factorization of 133?