Quote Originally Posted by guuchan View Post
I heard the chance of winning 1st prize is 1 out of billions and of grand prize is trillions/etc.

Someone got her/his math wrong. Currently the chance of winning 1st prize is 1 out of 475,020; chance of winning grand prize is nearly non-calculatable as it involves a good number of possibilities, but it is very achievable (e.g. winning 3rd prize thrice). If you do manage to come up with a formulae for calculating the chance of winning grand prize, you are more than welcome to share it with us in the channel.
This is bullshit. 29 28 27 26 25 24 = 342,014,400. Unless guuchan is rigged even on the non100th drawings.

Formula is singular.