Related Clues:

• 3, 5 or 7, but not 9
• Top-quality integer, per the USDA?
• One of 25 under 100 (but not 1, 25 or 100)
• 73 or 173, to mathematicians
• 13, 29 or 43, e.g
• 2, 3, or 5
• 8,675,309, for one ... or a hint to each asterisked clue's answer
• Excellent anaesthetic for two or three?
• 2, 3, or 5, e.g