Which phase of mitosis is the longest?

The longest phase of mitosis is prophase. According to the reference, "The first and longest phase of mitosis is prophase."

Here's a more detailed breakdown:

While the duration of each phase can vary depending on cell type and other factors, generally, prophase takes the longest time to complete.

Mitosis Phase	Duration
Prophase	Longest
Metaphase	Shorter
Anaphase	Relatively Short
Telophase	Intermediate