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Using color-kinematics duality, we construct for the first time the fullintegrand of the five-loop Sudakov form factor in N=4 super-Yang-Mills theory,including non-planar contributions. This result also provides a firstmanifestation of the color-kinematics duality at five loops. The integrand isexplicitly ultraviolet finite when D<26/5, coincident with the known finitenessbound for amplitudes. If the double-copy method could be applied to the formfactor, this would indicate an interesting ultraviolet finiteness bound for N=8supergravity at five loops. The result is also expected to provide an essentialinput for computing the five-loop non-planar cusp anomalous dimension.

Color-kinematics duality and Sudakov form factor at five loops for N=4 supersymmetric Yang-Mills theory