nBits, Target Threshold

Definition

The target is the threshold below which a block header hash must be in order for the block to valid, and nBits is the encoded form of the target threshold as it appears in the block header.

Synonyms

• nBits

• Target

Not To Be Confused With

• Difficulty (a number measuring the difficulty of finding a header hash relative to the difficulty of finding a header hash with the easiest target)

Links

• Target — Bitcoin.org Developer Guide

• nBits — Bitcoin.org Developer Reference

• Target — Bitcoin Wiki

• How is the target section of the block header calculated? — Bitcoin StackExchange