falls into the long-term stable lineage, based on Linux Kernel 5.4 LTS (Long Term Support). This specific build, x86-64 , signifies it is compiled for 64-bit Intel and AMD processors.
Navigate to porteus-kiosk.org. Under the "Download" section, select the "Community Edition" (free) or "Professional Edition" (paid with remote management). Version 5.4.0 is available in the archive or as the latest stable release depending on the current date. Porteus-Kiosk-5.4.0-x86-64.iso