The current version is "Threepenny". I have never seen it split into 2 words although I am sure some other version may have done it. "3Penny" is from the Sting revival.
"The hallmark of aristocracy is responsibility. Oh brother, that got me, that did me in!"
Its such a great show. Very underperformed in the UK sadly but seen a couple of good productions and twisted arms to include some of its score in a concert the other year