No.
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If the seven numbers are the only possible outcomes then there is no mode. Otherwise each one of the seven is a mode since they appear more often than the numbers that do not appear at all.
The mode is the number that occurs most often in a list. As both numbers appear the same amount of times, there is no mode.
The mode is the number that occurs most often, but as both numbers appear once, there is no mode.
The mode is the number that appears most often. As all the numbers appear once, there is no mode for that set of numbers.
Larger semiprime numbers are often mistaken for prime if their other factor(s) are not obvious. 40477, for instance, might appear prime at first.