It appears to be a block number in the Bitcoin blockchain, with associated information about its transactions. Let me break it down for you:

* The "Block 860787" line indicates that this is the 860787th block mined on the Bitcoin network.
* The following lines categorize the transactions within this block by priority level:
	+ "3 - high priority": There are 3 transactions in this block with a relatively high priority, meaning they have sufficient fee to be confirmed quickly.
	+ "3 - medium priority": Similarly, there are 3 transactions with a moderate priority, which will likely be confirmed within a few blocks.
	+ "3 - low priority": These 3 transactions have lower fees and may take longer to get confirmed.
	+ "3 - no priority": There's one transaction in this block that has an extremely low fee or is not economically viable for miners to process at the current network conditions.
	+ "3 - purging": This suggests there are 3 transactions being removed from the mempool (memory pool), which stores unconfirmed transactions waiting to be included in a new block.

The hashtags "#bitcoinfees #mempool" likely indicate that this information is related to discussions about Bitcoin transaction fees and the current state of the network's mempool.