Does Factory Reset reset Xposed Modifications, especially on Note 3 SM-N900 Exynos?
Xposed will survive, and your root should as well. But you'll need to reinstall the Xposed installer app and any xposed modules you had installed before you factory reset.

EDIT: So, to clarify, xposed modifies /system/bin/app_process to "hook" in to android. This modification is not touched by a factory reset. Nor is the su binary. However, the Xposed installer app (which is responsible for the upgrading of the app_process modifications), and any xposed modules will be cleared.