The odds of winning the jackpot in Mega Millions are almost 176 million to one. The odds of winning the jackpot in Lotto 6/49 are close to 14 million to one.
Everyone knows that a million-to-one chance pays off nine times out of ten. So specifying a reasonable field and a reasonable number of choices (i.e., you can’t have a million numbers in the field and you can choose only one number to win the jackpot), what would a lottery game in which the odds of winning the jackpot are exactly one million to one look like?
EDIT: Changed title from ‘One in a million’ to ‘Million-to-one’, in an effort to prevent confusion and pedantry.