For all such primes, it is not only the sum of two primes, but also the difference of two primes?
Because 7-2 = 5, 3 + 2 = 5, and 2, 3, 5 and 7 are prime numbers, which is in line with the meaning of the question; so this prime number is 5
Because 7-2 = 5, 3 + 2 = 5, and 2, 3, 5 and 7 are prime numbers, which is in line with the meaning of the question; so this prime number is 5