Blockchain Explorers https://www.hulkshare.com/maychen9/ So, when there is a lot of transactions within the mempool and you compensated a relatively very low transaction cost, your transaction can continue to be unconfirmed for an extended period of time since miners/validators will find transactions with better charges first. It is kind of easy https://hubwebsites.com/story22109793/explorer-blockchain-btc-a-simple-key-for-blockchain-explorer-btc-unveiled-https-cutt-ly-3rj9ygbc