The Mu3e experiment is designed to search for
the lepton flavor violating decay $\mu^+ \rightarrow e^+e^-e^+$.
The ultimate aim of the experiment
is to reach a branching ratio sensitivity of $10^{-16}$.
The experiment is located at the Paul Scherrer Institute (Switzerland)
and an existing beam line providing $10^8$ muons per second will allow
to reach a sensitivity of a few $10^{-15}$ in the first phase of the experiment.
In the middle of 2021 a successful Integration Run was performed with a reduced detector
and a slice of the readout chain envisaged for the final detector.
The design and prototyping of the detector is mostly finalized,
the production of the sub-detectors is underway
and the commissioning will start in the following years.