What would be the largest age gap in a person you would date?

JRC1611
Given the case that you're the younger person.
For instance, the widow of my great uncle got married to him when she was 20 and he was 49!! They eventually lived a happy married life

How many years older than you could accept in a partner, given that he/she has everything you're looking for.

P. S. I'm facing kind of a similar case
What would be the largest age gap in a person you would date?
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