Oldest Minecraft version

[Trul7Unkn0wn]

I search for this and I didn't find anything, so I wanted to ask I need to know how old purebdcraft, vanillabdcraft, and grimybdcraft. Works because I'm going to be starting up a series on YouTube. I need to know the absolute oldest version that it works in I'm hoping it goes back to 1. 0 release 1. 0 and if it goes into beta which I'm sure it doesn't that would be great but sound I'm pretty sure it goes up to like 1. 7 or something or maybe 1. 5 is is the oldest that it can get to. Thank you.

[HanFox]

The oldest versions are listed on the respective download pages for the pack.

Grunge and Vanilla don't cover much.

Pure goes back to MC1.2.5, I believe.