Block Explorer Proton https://www.instapaper.com/p/16801185 So, when there is a lot of transactions inside the mempool and you also paid a relatively very low transaction price, your transaction can stay unconfirmed for an extended length of time due to the fact miners/validators will decide on transactions with greater service fees 1st. https://keybookmarks.com/story20227928/blockchain-explorer-confirmed-transactions-today-top-guidelines-of-eth-blockchain-explorer-https-cutt-ly-3rj9ygbc