  Using the known resummation of virtual corrections together with knowledge of
the leading-log structure of real radiation in a parton shower, we derive
analytic expressions for the resummed real radiation after they have been
integrated over all of phase space. Performing a numerical analysis for both
the 13 TeV LHC and a 100 TeV $pp$ collider, we show that resummation of the
real corrections is at least as important as resummation of the virtual
corrections, and that this resummation has a sizable effect for partonic center
of mass energies exceeding $\sqrt{s} = {\cal O}$(few TeV). For partonic center
of mass energies $\sqrt{s} \gtrsim$ 10 TeV, which can be reached at a 100 TeV
collider, resummation becomes an O(1) effect and needs to be included even for
rough estimates of the cross-sections.
