How long to keep a egg at 100 degrees?

To cook an egg at 100 degrees Celsius (212 degrees Fahrenheit), it typically takes about 6 to 8 minutes for a soft-boiled egg and around 10 to 12 minutes for a hard-boiled egg. Cooking times may vary slightly based on the size of the egg and altitude. It's important to monitor the cooking process to achieve your desired level of doneness.