Syndicates allow you to cover more numbers by sharing the cost between the members of a group. If the syndicate ticket wins a prize, the total winnings will be divided equally among each share purchased in the syndicate – as members have the option to purchase more than 1 share.
https://n1-lotto.blogspot.com/2020/02/how-does-jackpot-lottery-work.html
http://vibrafusionlab.com/5045/has-anyone-claimed-euromillions-jackpot