Media playback is unsupported on your device Media caption Gloria Mackenzie from Florida says she will split the winnings with her son

An 84-year-old Florida woman has won the largest unshared jackpot in US lottery history - a prize of $590m (£383m).

Mother of four Gloria MacKenzie, who retired to Florida from Maine, bought the ticket in Zephyrhills on 18 May.

She opted to take a single lump sum of about $370m rather than the full amount spread over 30 years.

She appeared at the lottery HQ in Tallahassee with her son but did not speak to reporters.

But in a statement she said she bought the ticket in a Publix supermarket after another buyer "was kind enough to let me go ahead in line".

The $370m is reduced to about $278m after taxes.

The biggest lottery win in US history was $656m in March 2012 - but that was split three ways.

Ms MacKenzie retired to Zephyrhills more than a decade ago with her husband, Ralph. He died in 2005.