<p>The whole block header is hashed including: </p>

<ol>
<li>Block version number</li>
<li>256-bit hash of the previous block header</li>
<li>256-bit hash based on all of the transactions in the block (hashMerkleRoot)</li>
<li>the current timestamp as seconds since 1970-01-01T00:00 UTC</li>
<li>Bits (updated when he difficulty is adjusted)</li>
<li>Nonce</li>
</ol>

<p><a href="https://en.bitcoin.it/wiki/Block_hashing_algorithm" rel="nofollow noreferrer">https://en.bitcoin.it/wiki/Block_hashing_algorithm</a></p>

CC BY-SA 3.0
2018-03-04T12:09:53.247Z
2018-03-04T12:09:53.247Z
hardfork
<p>Other than the previous block hash and nonce data, which elements of a block are concatenated in order to be hashed?</p>

<blockchain><mining-theory><block>
Which elements of a block are hashed?
Archimede
# Which elements of a block are hashed?

(Asked by: username_0 on 2018-03-04)

Other than the previous block hash and nonce data, which elements of a block are concatenated in order to be hashed?

**Tags:** blockchain, mining-theory, block


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## 1 answers

### Answer by username_1 on 2018-03-04. Score: 4 | Accepted answer

The whole block header is hashed including:

1. Block version number
2. 256-bit hash of the previous block header
3. 256-bit hash based on all of the transactions in the block (hashMerkleRoot)
4. the current timestamp as seconds since 1970-01-01T00:00 UTC
5. Bits (updated when he difficulty is adjusted)
6. Nonce

<https://en.bitcoin.it/wiki/Block_hashing_algorithm>


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