The tutorial demonstrates how to apply hp-adaptive finite element methods efficiently on thousands of processes with distributed memory access. We make use of a hybrid geometric multigrid approach combined with matrix-free methods. This version requires a deal.II library of version 9.3, which needs to be configured with both p4est and Trilinos. Please visit https://dealii.org/current/doxygen/deal.II/step_75.html for a complete reference and the latest version of this tutorial. Compiling and running To generate a makefile for this code using CMake, create a build directory to your liking and type the following command into the terminal from the build directory: cmake /path/to/step-75 -DDEAL_II_DIR=/path/to/deal.II-9.3 To compile the program, call: make