[Dragon Star]

You are actually, I think you got 150 for the maximum predicted mass that a Star can sufficiently support it's self. (the opposite of becoming a black hole ) Though the largest Star known is thought to have a mass of just over 100 solar masses.

A quantitative analysis of this idea led to the prediction that a stellar remnant above about three to five times the mass of the Sun (the Tolman-Oppenheimer-Volkoff limit) would be unable to support itself as a neutron star via degeneracy pressure, and would inevitably collapse into a black hole.

-Wiki.