The National Lottery Thunderball draw takes place every Wednesday, Friday and Saturday. The maximum prize is £500,000 and is won by getting 5 numbers and the thunderball number. The minimum prize is won by getting just the thunderball number. The 5 main numbers are between 1 and 39 and the thunderball number is between 1 and 14. As the thunderball comes from a separate source from the main numbers, it is possible to have the same number come out as both a main number and a thunderball number.