ineedahit
I just tried this with IA before the eve drawing and predicted 758.
Previous winner 863
863 = vtrac 424 so we use vtrac 1,3,5
vtrac 1,3,5 = digits 0/5, 2/7, 4/9
pairs using those keys = 02 04 05 07 09 24 25 27 29 45 47 49 57 59 79
Then we use each of the previous winner's digits (8,6,3) as the 3rd digits for all these pairs and we end up get 578!