2 times 5 months here.
A couple nocturnal emissions the first months, then none. I did this as an experiment at a time when i decided i should try to break all unnecessary habits I had (drinking, smoking, masturbating). Very self empowering and interesting times. A bit tempting the first couple weeks, but nothing a bit of breathing and relaxing can't ride you through. And by refusing the reward of masturbation, i was often blessed with a more subtle reward of well-being or "high thinking".
Interestingly enough, this allowed me to interact with women more sincerely, with much less "parasitical" lusty thoughts, and i think this somewhat paradoxically increased my "sex-appeal", since three months in and both times i did this, i was approached by two jaw droppingly beautiful girls.
I gave in both times, which marked the ends of my abstinence periods, and looking back at it, i sometimes wonder if this was but a test i failed, and had i refused, something even more wonderful might have happened in my life...