I'm also surprised. I'm user 34967 and I was pretty far from Silicon Valley when I joined in late 2008.

Where are you finding your join number on GitHub? I just spent a few minutes looking at my profile and settings, but I don't see it anywhere.

	▲	hughdbrown an hour ago \| parent [-]
		curl -s https://api.github.com/users/mitchellh \| jq .id