do you mean, 6 weeks without ANY orgasm at all?
Ive gone more than 6 weks without jerking off many times -- but I get sucked off pretty frequently.
If you mean, how long without an orgasm....longest Ive gone is maybe 10 days. I don't recommend it. You'd think the first orgasm after a long dry spell would be super powerful and great -- but in my experience, it's not, for some reason.