  We use lattice simulations to study the single-site version of SU(N) lattice
gauge theory with two flavors of Wilson-Dirac fermions in the adjoint
representation, a theory whose large volume correspondent is expected to be
conformal or nearly conformal. Working with N as large as 53, we map out the
phase diagram in the plane of bare `t Hooft coupling, g^2 N, and of the lattice
quark mass, a*m, and look for the region where the Z_N^4 center symmetry of the
theory is intact. In this region one expects the large-N equivalence of the
single site and infinite volume theories to be valid. As for the N_f=1 case
(see Phys. Rev. D80: 065031), we find that the center-symmetric region is large
and includes both light fermion masses and masses at the cutoff scale. We study
the N-dependence of the width of this region and find strong evidence that it
remains of finite width as N goes to infinity. Simulating with couplings as
small as g^2 N = 0.005, we find that the width shrinks slowly with decreasing
g^2 N, at a rate consistent with analytic arguments. Within the
center-symmetric region our results for the phase structure, when extrapolated
to infinite N, apply also for the large volume theory, which is minimal walking
technicolor with N=infinity. We find a first-order transition as a function of
a*m for all values of b, which we argue favors that the theory is confining in
the infrared. Finally, we measure the eigenvalue densities of the Wilson-Dirac
operator and its hermitian version, and use large Wilson loops to study the
utility of reduction for extracting physical observables.
