  We consider massless Dirac fermions in a graphene monolayer subject to both a
perpendicular magnetic field $B$ and a proximity-induced pairing gap $\Delta$.
When the chemical potential is at the Dirac point, our exact solution of the
Bogoliubov-de Gennes equation yields $\Delta$-independent relativistic Landau
levels. Since eigenstates depend on $\Delta$, many observables nevertheless are
sensitive to pairing, e.g., the local density of states or the edge state
spectrum. By solving the problem with an additional in-plane electric field, we
also discuss how snake states are influenced by a pairing gap.
