Did you notice anything special about the hashes?

• Just like fingerprints, hashes are unique. Barring some exceptional circumstances, the hashes for two different things should never be the same.
• Hash functions are one way streets. You can’t reverse engineer a hash and figure out the data used to make it.
• Hashes are extremely reliable in the sense that they are deterministic. This means you can hash the same piece of data over and over again and you’ll always get the same result.

The function used here is called SHA-256 How is SHA-256 used in bitcoin? a very popular choice.

Now, let’s see if you can find a specific hash.

Find a hash that starts with a zero (“0”). Keep typing different things below until you find a hash that we want.