I think you just answered your own question. 55 = 2 + 53 53 + 2 = 55 See?
2-55 is -53.
53
53
53 is already a prime number so its factors are 1 and 53. 53 does not go into 12 or 55. The only number that goes in all three is 1.
55 is 53 higher than 2
55
53
The numbers 47 and 53 are prime.
53 and 55
53
55