Mine Your First Block

Classes 7–12 · about 6 minutes · free, no sign-up

What you will learn

Understand a hash as a fingerprint of data, mine a block by proof of work, and see why each extra zero makes it 16 times harder.

How to play

  1. Press "Try next nonce" and watch the hash change completely each time.
  2. Mine the block by hand until its hash starts with a 0.
  3. Then let the computer mine with 2 and 3 zeros, and compare the tries.
  4. Change the data after mining and see what happens. This is a toy: no real Bitcoin is involved.

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