23 can only be divided by itself or by one

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Appears at the intersection of 23rd Street and Mission Street. Part of a series of tiles between 24th Street and 22nd Street. Street art, except city-sanctioned.

See A human being gets 23 chromosomes from the mother and 23 from the father.

23_can_only_be_divided_by_itself_or_by_one.jpg

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