lotterypuzzle atlas

Bitcoin Puzzle record

Bitcoin Puzzle #63

found · spent

6.3 BTC nominal262 candidate keys

Where it sits on the line

Puzzles #51–#75: search work One column per puzzle; height is the base-2 logarithm of the search steps. Puzzle #63 is highlighted. The line sits at 2^69. #51 · 2^50 #52 · 2^51 #53 · 2^52 #54 · 2^53 #55 · 2^54 #56 · 2^55 #57 · 2^56 #58 · 2^57 #59 · 2^58 #60 · 2^59 #61 · 2^60 #62 · 2^61 #63 · 2^62 #64 · 2^63 #65 · 2^33 #66 · 2^65 #67 · 2^66 #68 · 2^67 #69 · 2^68 #70 · 2^35.5 #71 · 2^70 #72 · 2^71 #73 · 2^72 #74 · 2^73 #75 · 2^38
  • found
  • open · address only
  • open · public key on chain
  • the line · 269

This puzzle needs about 262 search steps — below the line (269).

Every puzzle below the line has been found.

Model: range scan. Every candidate key in the interval is hashed and compared with the address.

How the work is estimated

Record

P2PKH address
1NpYjtLira16LfGbGwZJ5JbDPh3ai9bjf4
mempool.space Blockstream
Known public key
0365ec2994b8cc0a20d40dd69edfe55ca32a54bcbbaa6b0ddcff36049301a54579
HASH160
ef58afb697b094423ce90721fbb19a359ef7c50e
Search class
historical
The output has been spent. Dates and labels are catalog attributions, not audited identities.
Candidate interval
262 → 263 − 1
start0x4000000000000000
end0x7fffffffffffffff
Interval size4611686018427387904 scalars. Exact BigInt bounds, not a floating estimate.

Snapshot 2 Oct 2026. The reward is the catalog's nominal allocation (N × 0.1 convention from 2023-04-16; earlier spends predate it), not a live balance. A key that matches the address proves the math, not that the coins are still there: check an explorer. Missing fields are omitted, not invented.

Solution record

Catalog date
Block
585074
Evidence
On-chain
Catalog label
zielar
A spend proves key control, not a forum identity.
Transactions
mempool.space tx Solve transaction · Blockstream

Where the key sat in its range

Published position in range: 95.01%

0% · start of rangeend of range · 100%

Published historical scalar (already public)

This hex scalar is already in the public puzzle corpus. It is historical evidence, not a live key to import. This page does not produce WIF and does not handle secret material.

0000000000000000000000000000000000000000000000007cce5efdaccf6808

Method

Historical record. Method notes for open puzzles live on the method page.