At a critical point in a component, the state of stress is given as σ_xx = 100 MPa, σ_yy = 220 MPa, σ_xy = σ_yx = 80 MPa and all other stress components are zero. the yield strength of the material is 468 MPa. The factor of safety on the basis of maximum shear stress theory is _________ (round off to one decimal place).