<p>No, it is not enough.</p>

<p>There is extra-nonce field. The scriptSig of coinbase transaction. </p>

CC BY-SA 3.0
2016-12-09T07:43:33.917Z
2016-12-09T07:43:33.917Z
amaclin
<p>Is it always possible to find an hash value of a block, smaller than the current difficulty, just using 4 byte (Nonce) ? How can we be sure about it ? </p>

CC BY-SA 3.0
2016-12-09T13:29:40.000Z
possible duplicate of [How can we be sure that a new block will be found?](http://bitcoin.stackexchange.com/q/22978/5406)
Murch
<blockchain><hash><proof-of-work><nonce>
Does 4 byte Nonce enough to proof of work?
carkaci
# Does 4 byte Nonce enough to proof of work?

(Asked by: username_0 on 2016-12-09)

Is it always possible to find an hash value of a block, smaller than the current difficulty, just using 4 byte (Nonce) ? How can we be sure about it ?

**Tags:** blockchain, hash, proof-of-work, nonce

> **Comments:**
> **username_1**: possible duplicate of [How can we be sure that a new block will be found?](http://bitcoin.stackexchange.com/q/22978/5406)  

---

## 1 answers

### Answer by username_2 on 2016-12-09. Score: 1 | Accepted answer

No, it is not enough.

There is extra-nonce field. The scriptSig of coinbase transaction.


---

