Quote from: sizeur on March 04, 2017, 10:59:42 AM

I am new to the bitcoin system, i have sent bitcoins 5 days ago and the order is still unconfirmed:

https://blockchain.info/tx/dfc41f646a3b1c2aa90bac2f89c80cac89edca869bd683f48105ec736cf3536b

According to "Received Time", you sent it 2 days ago (not 5 days ago).

Quote from: sizeur on March 04, 2017, 10:59:42 AM

- I thought that dynamic fee would calculate the appropriate fee, then why do i have the message "low fee" ?

Most likely you forgot to bring the slider to the most right side (even if you've checked the use dynamic fee option) and as result, ended up with "low fee" status.

Quote from: sizeur on March 04, 2017, 10:59:42 AM

- I wanted to have a look on viabtc accelerator but it seems to be out of order: https://www.viabtc.com/tools/txaccelerator/

It's not out of order but rather limited to maximum of 100 transactions per hour. Just keep trying it.

Quote from: sizeur on March 04, 2017, 10:59:42 AM

- Right now i see there is more than 60k unconfirmed transactions (https://blockchain.info/fr/unconfirmed-transactions), what's the usual number ?

Actually it goes up and down throughout the day but before the recent incidents (massive unconfirmed transactions going beyond 100k), it usually was on an average from 30k to 60k range at most.

Quote from: sizeur on March 04, 2017, 10:59:42 AM

- When will the network forget my transaction, how long can it last ?

Around 72 hrs.

Quote from: sizeur on March 04, 2017, 10:59:42 AM

- Does someone have any tips for me ?

Contact some users to help you out by including your transactions in a block, in exchange for some fees:

~~1. kano: https://bitcointalk.org/index.php?action=profile;u=36044~~
2. macbook-air: https://bitcointalk.org/index.php?action=profile;u=16114

Furthermore read this thread: https://bitcointalk.org/index.php?topic=1802212.0