Cumulative probability of the cash code with over 4 zeros

Visit the website https://andersbrownworth.com/blockchain/blockchain, which simulates the mining of blocks on a blockchain similar to Bitcoin’s. If you set out to mine a block by trial-and-error, how many Nonces would you need to attempt such that the cumulative probability of finding a satisfactory hashcode that begins with four or more zeroes is at least 50%?