777 - 259 = 518
777 - 259 = 518
259 x 3 = 777
1, 3, 7, 111, 259 and 777.
1036
1, 3, 7, 21, 37, 111, 259, 777
777
1 + 3 + 7 + 21 + 37 + 111 + 259 + 777 = 1,216
777/3 = 259. So the numbers are 258, 259 and 260.
1, 3, 7, 21, 37, 111, 259, 777 3, 7 and 37 are prime.
Yes, the answer is 259. But think: any real number is divisible by 3. Did you intend to put another requirement in the question?
1, 3, 7, 13, 21, 37, 39, 91, 111, 259, 273, 481, 777, 1443, 3367, 10101