I was toying with prim torture today and one of the shapes got me a thinking - so I put in a little script to show me the object's mass - quite impressive. ( it went from 126 to 11,000+ )
My question is what's the maximum mass anyone has ever achieved with a single prim ?
( Not gonna ask how you did it as I know the weapons people hold there "mass prims" as closely guarded secrets )
(edit)
A little further playing and the prim is at 21,260