h(x) = 593471f2cdfe809a6eda000908a976af22b236dc8f11deeaf38e7604cf0e9593
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).