K,ser_mask
1,0.9967152519
3,0.9933139604
10,0.9866396597
30,0.976371298
100,0.9609886779
300,0.9443205866
1000,0.92371647
3000,0.8849669152
10000,0.8426466786
30000,0.8076524286
65536,0.7837337919
100000,0.7731184695
300000,0.7358238662
1000000,0.7103847689