Nott said:Jamie Burnett is correct. The only break over 147 ever in proffesianol snooker tournament play.
from worldsnooker.com:
Burnett created a piece of snooker history as he made the highest break ever scored in professional competition.
Up against Leo Fernandez at Prestatyn in the qualifying rounds of the UK Championship, Burnett took the brown as an extra red after being awarded a free ball, then added the brown again and went on to pot all 15 reds with one blue, two pinks and 12 blacks. He cleared the colours to complete an amazing 148.
"I didn’t even realise I was on it until I’d got over 100 and saw that a 148 was on," said Burnett, who went on to win the match 9-8. "I didn’t really know how to react afterwards. At first I thought it was no big deal, but then I realised I’d made history.”
I'm pretty sure he didn't get the 147k prize because it was in the qualifying rounds. I recall the commentators once saying that if anyone ever made over 147 they would get the max prize, could be wrong though.