Difficulty, Network Difficulty
This definition comes from the technical glossary.
Definition
How difficult it is to find a block relative to the difficulty of finding the easiest possible block. The easiest possible block has a proof-of-work difficulty of 1.
Synonyms
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Difficulty
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Network difficulty
Not To Be Confused With
- Target threshold (the value from which difficulty is calculated)
Links
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Difficulty — Bitcoin.org Developer Guide
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Difficulty — Bitcoin Wiki
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How is difficulty calculated? — Bitcoin StackExchange