by 
America awaits its first lottery billionaire, after the Powerball jackpot rollover hit a world-record figure of $1.3 billion (£895.4 million).
No one won Saturday’s $949.8 million (£654.2 million) jackpot on 9 January, already the biggest in US history.
Strong ticket sales, fuelled by excitement over the enormous sum, have driven the prize money up ahead of the next draw on Wednesday.
Entrants in California were spending $2.8 million (£1.9 million) an hour on $2 tickets for the multi-state lottery before 9 January’s draw, compared to usual daily sales of $1 million (£689,000), said California Lottery spokesman Michael Bond.
The current jackpot started at $40 million (£27.6 million) on 4 November, meaning 13 January’s draw will be its 19th rollover.
The Powerball lottery can be played in 44 of the US’s 50 states and three US territories.
The winning balls are drawn on Wednesdays and Saturdays at 10.59pm (3.59am UK time).