  We present Monte Carlo simulation results for the three dimensional Thirring
model on moderate sized lattices using a hybrid molecular dynamics algorithm
which permits an odd or non-integer number Nf of fermion flavors. We find a
continuous chiral symmetry breaking transition for Nf approximately equal to 3
with critical exponents consistent with expectations from previous studies. For
Nf=5 the order of the transition is difficult to determine on the lattice sizes
explored. We present a phase diagram for the model in the (1/g^2,Nf) plane and
contrast our findings with expectations based on approximate solutions of the
continuum Schwinger-Dyson equations.
