Well like on the other post, Firstly, I'd like to apologize for the long reply. Holiday season at my country here, so kind off hectic. Anyways, I'd love to help on that but... my knowledge on this is pretty rusty. Sorry lad ;/ I'll try to ask a friend and get back to you if I get anything. Sorry again!
__________________________137 is an Eisenstein prime with no imaginary part and a real part of the form 3n − 1.