A £95 million EuroMillions jackpot will be the world's biggest lottery pay-out if it is won by a single player this week, Lottery organisers said.
Larger prizes have been won in the US but the actual payouts were lower either due to tax or because winners opted for smaller one-off lump sums.
The huge EuroMillions prize cannot roll again after Friday night's draw.
If no player matches all the winning numbers, the estimated £95 million top prize will be distributed among winners in the next prize level.
The draw will be broadcast at 11.35pm on BBC One on Friday - the first EuroMillions draw to be aired on UK terrestrial television.
Presenter Tim Vincent will host the new EuroMillions weekly televised draw, along with Sarah Cawood.
He said: "It's going to be quite something to reveal those seven lucky numbers each week. I have my fingers crossed for everyone."
Glasgow postal administrator Angela Kelly scooped £35.4 million on the EuroMillions jackpot last August.
EuroMillions is played in the UK and eight other countries: France, Spain, Austria, Belgium, Ireland, Luxembourg, Portugal and Switzerland.
