No, and 57 is not a prime number.
A twin prime pair are two primes separated by 2. For example, 3 and 5 are twin primes. It is conjectured that there are an infinite number of twin primes.
A number is never relatively prime.Relatively prime refers to a pair of numbers.
191 is prime. It has one pair of factors, one and itself.
It is a prime number, so there is only the one pair: 1, 23
A number with only one factor pair is........ a prime number for example 11 the only factor pair is one times 11.
1 and 2
A prime number is an integer which is greater than one and which is evenly divisible only by one and itself. A pair of prime numbers consists of two such numbers.
Common prime number is 2 only.
A twin prime is a prime number that is either 2 less or 2 more than another prime number-for example, the twin prime pair (41, 43).
A prime number
They are 2 and 17 = 19 which is also a prime number