What if you have one number and the mega ball?

Usually, if you only match one number, that does not mean you won. To win the jackpot, you must match all the numbers. On the other hand, some sources are saying that if you matched 5 of the 6 numbers, that gets you a prize of as much as $150,000. If in fact you have 5 numbers (or if you are the person who won the entire jackpot), you would notify the Mega Millions lottery office in your state and they would give you instructions for claiming your prize.