Look at the Thread link in my signature. I've added example with the exact function my system is using to draw the number.
Ok, I'll try not to spam here anymore. Thanks for your patience.

So acidu, with your strategy, say you want to buy 300 tickets now. So there will be 315 tickets. Lets simulate 100 draws:
http://www.random.org/integers/?num=100&min=1&max=315&col=4&base=10&format=plain&rnd=new
Every number below 16 is when you loose - it is still possible to loose...