  Reconstructing the vertices of primary interactions at the LHCb experiment is
an essential part of its online data acquisition sequence. The quest for ever
higher rates and luminosities gives raise to new challenges for such
algorithms. The LHCb Upgrade detector will start taking data in 2021 at an
instantaneous luminosity of $\mathcal{L} = 2 \times 10^{33} cm^{-2} s^{-1}$. A
RAMP challenge on fast primary vertex reconstruction using simulated data under
such conditions was performed at the RAPID2018 workshop held in November 2018
in Dortmund with the aim of exploring new techniques and ideas to solve this
problem.
