Dot Blockchain Explorer https://www.demilked.com/author/brownelivingston04/ So, when there is a large number of transactions while in the mempool and you also paid a comparatively small transaction price, your transaction can continue to be unconfirmed for an prolonged time period considering the fact that miners/validators will pick out transactions with bigger costs https://madbookmarks.com/story20357761/explorer-blockchain-neo-a-review-of-explorer-blockchain-ethereum-https-cutt-ly-3rj9ygbc