Challenge II

This challenge is over. You can find the solutions here.

Making a gentle introduction, clue 1 shows quite unrelated American regions excluding 1.

Find ? and go to the address www.alaricstephen.com/?

Arizona12
Colorado10
Idaho5
?
Nebraska8
New Mexico3
Oklahoma15
Utah13
Wyoming17

Initially I thought of giving you a hint...

Challenge II High Score Board

Arecibo Challenge Solution