Japt-R, 11 bytes

õ2 f@ìX e§1

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õ2 f@ìX e§1     :Implicit input of integer Uõ2              :Range [2,U]   f            :Filter by    @           :Passing each X through the following fuctionìX         :  Convert U to base X digit array        e       :  All§1     :    <=1                :Implicit output, joined with newlines