Every time you double the amount of tickets, you also double your chances of winning:
4 = 1:50,000,000
8 = 1:25,000,000
16 = 1:12,500,000
32 = 1:6,250,000
64 = 1:3,125,000
128 = 1:1,562,500
256 = 1:781,250
512 = 1:390,625
1,024 = 1:195,312.5
2,048 = 1:97,656.25
Every time you double the amount of tickets, you also double your chances of winning:
4 = 1:50,000,000
8 = 1:25,000,000
16 = 1:12,500,000
32 = 1:6,250,000
64 = 1:3,125,000
128 = 1:1,562,500
256 = 1:781,250
512 = 1:390,625
1,024 = 1:195,312.5
2,048 = 1:97,656.25