Xai Blockchain Explorer https://www.instapaper.com/p/16801185 So, if there is a large number of transactions during the mempool and you simply paid out a comparatively small transaction cost, your transaction can continue to be unconfirmed for an extended time period because miners/validators will select transactions with better charges initial. An unconfirmed transaction https://www.demilked.com/author/brownelivingston04/