The greatest Prime number of 5141 is 71.
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The greatest factor of any positive number is the number itself.
13 is the largest prime factor of 3120.
The greatest common factor of a prime number & a composite number is 1 if the composite number is not divisible by the prime number. 81(composite number) is not divisible by 29(prime number) so, gcf(29,81) = 1.
It is: 29
It is: 1 because 13 is a prime number