Nonce
Mining● Common
A 32-bit field in the block header that miners increment to find a valid proof-of-work hash. 'Number used once.' When the nonce space is exhausted, miners modify the extranonce in the coinbase transaction or use timestamp/version rolling.
Technical Notes
Range: 0 to 2^32 (~4.3 billion). At current hashrates, exhausted in <1 second. Miners also vary: extranonce (coinbase), timestamp, version bits (overt ASICBoost). Valid block: SHA256d(header) < target. Golden nonce: one that produces valid hash.
Metadata
Visibility: Public
Created:1/3/2026by System