It is well known that 2D Ising model at critical point can be described by a 2D CFT. The CFT is identical to free Majorana fermions. It has three primary operators namely
The Ising spin $\sigma$ with weight $(1/16, 1/16)$.
The energy density $\epsilon$ with weight $(1/2, 1/2)$.
As far as I understand these are global i.e, $SL(2,R)$ primaries. But 2D CFTs have larger symmetry group - Virasoro group. What are those Virasoro primaries?