Status of the Long MQXFB Nb$_3$Sn Coil Prototype Production for the HiLumi LHC

The high luminosity Large Hadron Collider (LHC) upgrade target is to increase the integrated luminosity by a factor 10, resulting in an integrated luminosity of 3000 fb-1. One major improvement foreseen is the reduction of the beam size at the collision points. This requires the development of 150-mm single-aperture quadrupoles for the interaction regions. These quadrupoles are under development in a joint collaboration between CERN and the US-LHC Accelerator Research Program. The chosen approach for achieving a nominal quadrupole field gradient of 132.6 T/m is based on the Nb$_{3}$Sn technology. The coils with a length of 7281 mm will be the longest Nb$_{3}$Sn coils fabricated so far for accelerator magnets. The production of the long coils was launched in 2016 based on practise coils made from copper. This paper provides a status of the tooling development and production of the first copper coil, from winding, curing, and reaction heat treatment. In addition, an overview of the upcoming coil vacuum impregnation and the development of the magnet assembly including a prototype production schedule are provided.