  We perform large-scale quantum Monte Carlo simulations of SLAC fermions on a
two-dimensional square lattice at half filling with a single Dirac cone with
$N=2$ spinor components and repulsive on-site interactions. Despite the
presence of a sign problem, we accurately identify the critical interaction
strength $U_c = 7.28 \pm 0.02$ in units of the hopping amplitude, for a
continuous quantum phase transition between a paramagnetic Dirac semimetal and
a ferromagnetic insulator. Using finite-size scaling, we extract the critical
exponents for the corresponding $N=2$ chiral Ising Gross-Neveu universality
class: the inverse correlation length exponent $\nu^{-1} = 1.19 \pm 0.03$, the
order parameter anomalous dimension $\eta_{\phi} = 0.31 \pm 0.01$, and the
fermion anomalous dimension $\eta_{\psi} = 0.136 \pm 0.005$.
