Solved
Bitcoin puzzle #50
Bitcoin puzzle #50 has been solved. Its private key is 22bd43c2e9354. The address originally held 0.05 BTC, which was swept by whoever found the key first.
Puzzle #50 at a glance
- Total received
- 0.05000546 BTC
- Balance now
- 0.0 BTC
- Address
- 1MEzite4ReNuWaL5Ds17ePKt2dCxWEofwk
- HASH160
- de081b76f840e462fa2cdf360173dfaf4a976a47
- Range start
- 2000000000000
- Range end
- 3ffffffffffff
- Bit length
- 50-bit
- Keys in range
- 562,949,953,421,312 (562949953421312)
- Transactions
- 4
The solved key
- Private key
- 22bd43c2e9354
- Decimal
- 611140496167764
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgfXBMYdNVA4EjUMzg
Verify it yourself: multiply this key by the secp256k1 generator point, compress the resulting public key, and take RIPEMD-160(SHA-256(·)). You get exactly the HASH160 above. This site performs that check on every published key at build time.
Puzzle #50 — common questions
How many private keys does Bitcoin puzzle #50 contain?
Puzzle #50 spans the range 2^49 to 2^50−1, which is exactly 562,949,953,421,312 private keys — twice as many as puzzle #49.
How long would it take to solve Bitcoin puzzle #50?
An eight-core machine running this browser solver at four million keys per second would need about 4 years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 9 minutes.
How much is Bitcoin puzzle #50 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.05000546 BTC.
Is Bitcoin puzzle #50 solved?
Yes. Its private key is 22bd43c2e9354 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgfXBMYdNVA4EjUMzg in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #50?
From 2000000000000 to 3ffffffffffff in hexadecimal. The address is 1MEzite4ReNuWaL5Ds17ePKt2dCxWEofwk and its HASH160 is de081b76f840e462fa2cdf360173dfaf4a976a47.