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Q: Why is a number 6 times n plus 1 a prime number or a product of a number 6 times m plus 1 or a product of a number 6 times k minus 1?

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The product is positive

Either it is a prime or put m = n! Is that it?

As a product of its prime factors: 5*7*11 = 385

The product of two prime numbers can never be another prime number, the numbers that you multiplied are factors of the product. (example, 9 times 5 is 45, 9 and 5 go into 45)

22 is a composite number because it can be produced from the product of 2 times by 11.Prime numbers are ones that are the product of themselves times by one alone example 3 is a prime cos' it is 3 times 1 only this alone.It's a composite number. It cannot be prime because it is divisible by two.

How about: 3*5 = 15 as a product of its prime factors

3 times 13

5 times 37

12

As a product of its prime factors: 7*13 = 91

As a product of its prime factors: 2*2*2*5 = 40 or as 23*5 = 40

As a product of its prime factors in exponents: 2^4 times 5^5 = 50,000

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