The product of two prime numbers must be a composite number?

Yes. The product of two prime numbers is a composite number with these two prime numbers as factors

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1. The sum of two prime numbers must be a composite number,
2. Is the sum of two prime numbers a composite number
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5. There is a prime number and a composite number. Prime number: our composite number is 15. Composite number: our product is 36. What are these two numbers
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12. The product of two prime numbers must be______ ．
13. The product of two prime numbers must be______ ．
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16. Which of these numbers are prime numbers and which are composite numbers 15 157 97 28 19 960 138 37
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