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How do you check if a number is prime? - Answers

if its even, automatically not prime. 0s and 5s are not prime. add the first 3 numbers up, (from the right) and divide them by 8. if it is divisible, it's not prime. 4 is the same thing accept only the first 2 numbers from the right. That's all i can remember from the top of my head, and 6 might be add all of them together and divide, divisible=not prime.



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How do you check if a number is prime? - Answers

https://math.answers.com/math-and-arithmetic/How_do_you_check_if_a_number_is_prime

if its even, automatically not prime. 0s and 5s are not prime. add the first 3 numbers up, (from the right) and divide them by 8. if it is divisible, it's not prime. 4 is the same thing accept only the first 2 numbers from the right. That's all i can remember from the top of my head, and 6 might be add all of them together and divide, divisible=not prime.



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https://math.answers.com/math-and-arithmetic/How_do_you_check_if_a_number_is_prime

How do you check if a number is prime? - Answers

if its even, automatically not prime. 0s and 5s are not prime. add the first 3 numbers up, (from the right) and divide them by 8. if it is divisible, it's not prime. 4 is the same thing accept only the first 2 numbers from the right. That's all i can remember from the top of my head, and 6 might be add all of them together and divide, divisible=not prime.

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      if its even, automatically not prime. 0s and 5s are not prime. add the first 3 numbers up, (from the right) and divide them by 8. if it is divisible, it's not prime. 4 is the same thing accept only the first 2 numbers from the right. That's all i can remember from the top of my head, and 6 might be add all of them together and divide, divisible=not prime.

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