factorial.macho64 was produced (essentially) by:

gcc factorial.c
mv a.out factorial.macho64

with:

Apple LLVM version 8.1.0 (clang-802.0.42)

===

factorial.elf64 was produced by:

gcc factorial.c -o factorial.elf64

with "gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0"
