Bitcoin Forum

Other => Beginners & Help => Topic started by: threebuddies on July 29, 2011, 04:21:13 AM



Title: Confirmation time
Post by: threebuddies on July 29, 2011, 04:21:13 AM
How many confirmations does it take for a transaction to complete?


Title: Re: Confirmation time
Post by: nafai on July 29, 2011, 04:45:22 AM
It is the choice of whoever you are transacting with.  Newly mined coins are only considered "totally" confirmed after 120 blocks, but this is way way overkill and nobody uses that many confirmation for regular bitcoin transactions.  You are quite safe in assuming a transaction is legit after 4 or 5 confirmations.  There has never been a block split and reorganization more than 3 blocks long if I recall correctly...   I think a 3 block reorg only happens naturally every couple hundred years (unless there is something fishy going on like if a single mining pool were to obtain >51% of the hashing power and try to manipulate the system by doublespending because of it, or some such)


Title: Re: Confirmation time
Post by: Roadhog2k5 on July 29, 2011, 05:28:58 AM
7?


Title: Re: Confirmation time
Post by: threebuddies on July 29, 2011, 06:21:41 PM
Well one of them has 512 confirmations and the other one has 896.


Title: Re: Confirmation time
Post by: nafai on July 29, 2011, 08:20:30 PM
Then the transaction is complete, a long time ago.  A "confirmation" just means the transaction was included in a block in the official blockchain.  The number of confirmations never stops going up, as more blocks are added to the blockchains confirmations for old transactions keep appearing.

A transaction in my wallet from 6/29 (a month ago) currently has 4820 confirmations.


Title: Re: Confirmation time
Post by: threebuddies on July 30, 2011, 03:18:52 AM
Oh ok


Title: Re: Confirmation time
Post by: SHlFT on July 30, 2011, 04:34:14 AM
I have one with 10000 Confirmations.


Title: Re: Confirmation time
Post by: fush6644 on July 30, 2011, 02:19:57 PM
im up to 13,660 :)