How long do unconfirmed transactons live in the network?

[amaclin]

1Enjoy 1Sochi

e839cd008dd0d38a9eed7028f2b14781cae60973d759ca613c00d62d0ebe6f7a
388f9c850170f5491e43793541edc8defe59872f53f1e898d2c2727601a9b687
d0fe3fab609b961f3cdb4c97d8370b85952538e7eda77fca31a8a9216d76e0cb
563b14e1ff137a37e52b9b41b57d5d4742ecc445047b20e52569bc5923e8d934
bb3318e9596aefaffd83ed059c5f2f0123875702a7ad9f43abcd4c8663864602
41d3f46b42dfb493a1057ca5f2e10c6cc42abf50335834a274cc1bd8cf452746
bc814a32730f72225b470875b99eac205efd476c49178fb04f9207ac133d5d79
70aea3503f5a636ff244a86f6be70a3520ec344d0a4e1c8bad60983778e8b191
804b6a7c6ec990747e9e2482740c57baf4faf793769f445f8c0c36327f4128da
8f3bf1e8494953b21b63f682016ab92adea2f2c2fe3359aaf34061d061f7f10b

and so on 

[1715269329]

1715269329

[1715269329]

1715269329

[1715269329]

1715269329

[watemp]

I think there is a direct dependence on the fee for the transaction. It can hang indefinitely, if the fee is too small.

[Andre_Goldman]

Similar to tcp/ip packet TTL I guess ( Time to live - TTL https://en.wikipedia.org/wiki/Time_to_live)

As of Bitcoin Core 0.14.0, these are the ways a transaction can leave the mempool:

The transaction was included in a block.

The transaction or one of its unconfirmed ancestors conflicts with a transaction that was included in a block.

The transaction was replaced by a newer version (see BIP 125).

The transaction was at the bottom of the mempool (when sorted by fee per size), the mempool had reached its size limit (see the -maxmempool option), and a new higher-fee transaction was accepted, evicting the bottom.

The transaction expired by timeout (by default 14 days after entering).

Also, transactions that have left the mempool can always enter them again. For example, when they're part of the local wallet and get rebroadcast, or when they're received again over the network. Eviction does not imply a transaction is cancelled.
Since Bitcoin Core 0.14.0, the mempool is saved to disk, so it persists across restarts. In earlier versions a restart would also result in a wiped mempool.

source: https://bitcoin.stackexchange.com/questions/46152/how-do-transactions-leave-the-memory-pool/46162#46162

...

[jpoker272727]

I have seen 2-3 days maximum but for 14 days I havent seen any yet.

It really sucks seeing your transaction being unconfirmed for a long time especially if we are in hurry! But after few free bitcoin transaction accelerators, the problem and worrying about unconfirmed transactions are almost getting eliminated for  most of bitcoiners here. We are able to accelerate our transactions to get quick confirmations even accidentally we have included lower transaction fees.

[lizardbtc]

They should live like for 3days max if I remember correctly, but again the question is will the transaction be rebroadcast-ed? Because if it is rebroadcasting itself then most likely it can be unconfirmed for a long periods of time, can be even infinity if we want to make it that way, we can.

Jesus Christ these are all spam transactions that you have linked up all of 1 satoshi... no wonder why we have to many transactions and why the network is jamed.... I have seen these spam transactions with higher send units but not 1 satoshi....

[amaclin]

Jesus Christ these are all spam transactions that you have linked up all of 1 satoshi...

They were sent to the network more than 3 years ago  
https://bitcointalk.org/index.php?topic=458934.0

[Coding Enthusiast]

The correct answer is forever, or until a miner picks them up or become invalid

Edit: Example o a miner picking up weird tx: https://blockchain.info/tx/bb41a757f405890fb0f5856228e23b715702d714d59bf2b1feb70d8b2b4e3e08 (999657 (bytes) in block 364292 containing only this tx and coinbase tx)

[blofoma]

If you doing the transaction for the first time, make sure to do the transaction only after confirmation.
if not for the first time please confirm from the sender to resend with a free. actually it will be for max 5 days.

[milani]

I am shocked. Transactions, that haven't neen confirmed since 2014 are mentioned there. Unbelievable!!! If there is not a link I would think it's a joke. 

[amaclin]

Edit: Example o a miner picking up weird tx: https://blockchain.info/tx/bb41a757f405890fb0f5856228e23b715702d714d59bf2b1feb70d8b2b4e3e08 (999657 (bytes) in block 364292 containing only this tx and coinbase tx)

This particular transaction was not picked form the network.
It was created by f2pool admin with his private tools directly on pool node.