<p>While looking up how a block get mined I stumbled over the version number in the header - which is used to "keep track of changes to the protocol".</p>

<p>But even in the last 5 blocks of the chain (at the state of writing) there were 4 different version numbers - so my questions are:</p>

<p>"What does the version number represent?" followed by "Will a mined block with a random version number get rejected - or could a miner simply use it as an extension of nounce (and thereby effectively double the length of the nounce)</p>

CC BY-SA 4.0
2020-04-03T16:08:28.343Z
Take a look at the answer provided here, it might help you out.
[Unusual Version Number in Blocks](https://bitcoin.stackexchange.com/a/79274/97740)
Allan Romanato
CC BY-SA 4.0
2020-04-03T16:11:20.467Z
Also check out here [A Decomposition Of The Bitcoin Block Header](https://www.datadriveninvestor.com/2019/11/21/a-decomposition-of-the-bitcoin-block-header/)
Allan Romanato
<block><hash>
What does the version number in the blockheader represent
Dalian
# What does the version number in the blockheader represent

(Asked by: username_0 on 2020-04-03)

While looking up how a block get mined I stumbled over the version number in the header - which is used to "keep track of changes to the protocol".

But even in the last 5 blocks of the chain (at the state of writing) there were 4 different version numbers - so my questions are:

"What does the version number represent?" followed by "Will a mined block with a random version number get rejected - or could a miner simply use it as an extension of nounce (and thereby effectively double the length of the nounce)

**Tags:** block, hash

> **Comments:**
> **username_1**: Take a look at the answer provided here, it might help you out. [Unusual Version Number in Blocks](https://bitcoin.stackexchange.com/a/79274/97740)  
> **username_1**: Also check out here [A Decomposition Of The Bitcoin Block Header](https://www.datadriveninvestor.com/2019/11/21/a-decomposition-of-the-bitcoin-block-header/)  

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## 0 answers

