h(x) = e3313aa4437536e27dcb4dbe0778807fe569a3567119a159fbf386b8df21eec7
author: unknown
h(x) looks like a cryptographic hash, and refreshing the page shows it changes every 5s. We find that the SHA256 hash of the unix time (floored by 5 seconds) gives us the same hash. Thus the answer is the current unix time (and values within ± a minute are accepted).