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Anonymous
Since the sum if its digits (1 + 7 + 7 = 15) is divisible by 3, the original number 177 is divisible by 3.Now we know that it has at least one factor in addition to '1' and itself, so it's not prime.
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the number 177 is not a Prime number. 3 and 59 go into 177.
composite
It is prime
86 is not a prime number, so is a composite.
No 168 is not a prime number it is a composite number
no