Day in numbers: 6

By Jackie Dent for CNN

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LONDON, England (CNN) -- 6: The number of minutes it takes to cook the perfect egg in a machine invented by British student Simon Rhymes. The Bulbed Egg Maker (BEM) uses lightbulbs, and no water.

600: The number of eggs Simon experimented with before discovering the perfect time he needed to cook an egg. The 23-year old student was studying for a degree in product design at Bournemouth University when he developed the machine.

250: The temperature in Celsius that the four halogen lights in the BEM reach to heat the egg. When the lights go out, the egg is cooked. The cooking time can be altered if you prefer your yolk runny.

78: The number of calories in a medium-sized egg.

13: The day in October when egg lovers can celebrate World Egg Day.

4.93 billion: The estimated number of egg-laying hens in the world.

53.4 million: The number in tonnes of table eggs produced in 2002, with 20.25 million tonnes produced in China, which is the world's largest egg producer.

1 in 20,000: The percentage of eggs that can harbor Salmonella enteritidis bacterium inside their shells.

13: The number of people attacked with eggs over a 14-month period who went to the eye unit of Liverpool hospital seeking treatment. Most cases were clustered around Halloween.