0x5c368150…1bb9sent to0x92491338…7505·#13,286,870·view on Etherscan
"The best block number is 4563209. Why? 4563209 is the first Ethereum block used to Update Message on the Number Board. 4563209 also contains the number 5329, which is 73 squared. And 73, as you all know, happens to be the best number."