Does 4 byte Nonce enough to proof of work?

Question

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 ?

possible duplicate of [How can we be sure that a new block will be found?](http://bitcoin.stackexchange.com/q/22978/5406) — Murch, Dec 09 '16 at 13:29

score 1 · Accepted Answer · answered Dec 09 '16 at 07:43

1

No, it is not enough.

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

answered Dec 09 '16 at 07:43

amaclin

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Does 4 byte Nonce enough to proof of work?

1 Answers1