Bitcoin Explorer Genesis Block https://www.instapaper.com/p/16801185 So, if there is a large number of transactions in the mempool and you simply paid out a comparatively very low transaction price, your transaction can stay unconfirmed for an prolonged timeframe considering that miners/validators will pick transactions with greater fees initially. The mempool fundamentally https://cruxbookmarks.com/story20528235/blockchain-explorer-unconfirmed-transaction-top-guidelines-of-explorer-blockchain-tron-https-cutt-ly-3rj9ygbc