Riddle

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Across
  1. 3. a number that has only 2 factors
  2. 5. one of the numbers you multiply in a multiplication sentence
Down
  1. 1. a number that has more than 2 factors
  2. 2. the product of two whole numbers
  3. 3. the result you get when you multiply two numbers
  4. 4. when a composite number is written as a product of all its prime factors