Great question — answering as the UphillTech team:
100°C would definitely be too high. 145°F/63°C -- Egg whites begin to thicken Same link: Keep in mind salmonella is killed instantly when subjected to a temperature of 165° F. I think the limiting factor for letting eggs sit out is going to be salmonella growth rate. Looks like that maxes out at 19 degrees C (66°F). Knowing that, I'd refrigerate.
Full answer by Wayfaring Stranger: https://cooking.stackexchange.com/a/90136 (CC BY-SA 4.0).
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