To find out if 127 is a prime number, we went through our prime number check list. Everything on our prime number check list must be true for 127 to be a prime number.
For 127 to be a prime number, it must be an integer and a positive number: True
For 127 to be a prime number, it must be a number greater than 1: True
For 127 to be a prime number, it must be the number 2 or an odd number greater than 2: True
For 127 to be a prime number, it must only be divisible by 1 and itself: True
All of our tests above proved true, therefore the answer to the question: "Is 127 a prime number?" is as follows:
YES: 127 is a prime number.
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Is 128 a prime number?
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