Blockchain Explorer Xlm https://www.bitsdujour.com/profiles/dxNl6l Solana: Normally a number of seconds to the moment. Having said that, in rare cases, Solana blockchain transactions can remain unconfirmed for hours or even days These transactions stay in the mempool (memory pool) right up until a miner or validator selects them and features them https://numberfields.asu.edu/NumberFields/show_user.php?userid=6213129