Not long ago I was watching I believe Antpool finding 4 blocks in a row and it made me wondering...
Which pool has the highest streak of finding a lot blocks in a row?
maybe asic miner
friedcat
they had a big piece of the network in spring 2013
maybe cex.io they were really big a while back
here is a simple way to figure out odds..
if you have 50% of the network
0.500000 one block in a row
0.250000
0.125000
0.062500
0.031250
0.015625 so about 63 to 1 shot 6 in a row
if you have 40%
0.400000
0.160000
0.064000
0.025600
0.010240
0.004096 so about 244 to 1 shot 6 in a row
if you have 30%
0.300000
0.090000
0.027000
0.008100
0.002430
0.000729 so about 1371 to 1 shot 6 in a row
based on the math above
6 in a row has had to have happened more then once.