Convergence test for the cumulative mass function for different particle mass ({6.35 × 10¹¹, 7.94 × 10¹⁰, 9.92 × 10⁹} h⁻¹ M_⊙, respectively, {256³, 512³, 1024³} particles in a box of 500 h⁻¹ Mpc) and spatial resolution set by the gravitational softening (ϵ = {l/20, l/40, l/80}, where l is the mean interparticle distance). The filled region in grey represents the 1 percent region around unity and the filled region in red represent the 68 percent confidence level assuming Poisson distribution for the abundance of halos in both simulations.