Bitcoin Explorer Github https://www.instapaper.com/p/16800477 So, if there is a large number of transactions in the mempool and you simply paid out a comparatively low transaction fee, your transaction can keep on being unconfirmed for an extended time frame because miners/validators will select transactions with bigger expenses very first. The mempool https://bookmarkunit.com/story20325531/blockchain-explorer-confirmed-transactions-about-blockchain-explorer-search-https-cutt-ly-3rj9ygbc