79
53 59 61 67 71 73 79 83 89 97.
61, 67, 71, 73, 79, 83, 89, 97, so 79 is nearest
47, 53, 59, 61, 57, 71, 73, 79
Add them up. 61 67 71 73 79 83 89 97
Any number except 61 67 71 73 and 79 which are prime numbers
53 59 61 67 71 73 79 83 89 97
53 59 61 67 71 73 79 83 89 97.
67, 71, 73, 79, 83, 89
61 67 71 73 79.
They are: 67, 71, 73, 79
61, 67, 71, 73, 79.