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Yes and to check it you need only go up to the square root of 47. So check 2, 47 is odd so no way. check 3...4+7=11 so 47 is not a multiple of 3 so not a factor. check 5.. nope, it does not end in 5 or 0 so can't be. check 7, 7x7 is 49 so no way.. we don't need to check any others since 7 is greater than the square root of 47. So we have shown it is prime.

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Q: Is the number 47 prime
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