An AMD Ryzen Threadripper PRO 5995WX has surfaced on PugetBench, confirming that it is a 64-core processor. The benchmark results also detail AMD's next reference platform and the socket it supports.
https://www.notebookcheck.net/AMD-Ryzen-Threadripper-PRO-5995WX-benchmarked-on-Sharkstooth-CGL-reference-platform-with-64-cores.557920.0.html