In order to win the super-jackpot, one must roll the exact lucky number 77.7777.
Quote from: john link=https://forum.letsdice.com/index.php?topic=236.msg731#msg731
In order to win the Super-Jackpot, one must roll the exact lucky number 55.5555:
77.7777, 55.5555 or both
Decided to make it 55.5555 so that 77.7777 doesn't win two jackpots. Updated the OP to reflect this.