The most popular lotto in my country is 6/58. It is always blockbuster because of its huge rewards, it is legal because the government of my country controls it.
What your country is?. Lotto in my country has been banned 30 year ago. Ilegal right now, but still people can buy it on background and police always patrols to catch dealers who sell it online and offline the market place.
I prefer to find the online lotto games than to try to play lotto in real life because I won't risk my self to play even in the underground. We can be safe in some time, but we never know when we cannot be safe ourselves from the police because I am sure that the police will search for people who play gambling in your country. Lotto in my country is on the grey side, and the government is not making it illegal or legal so people can play it anytime.