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A168586
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Smallest n-digit prime with only digits 0 and 1, and having least digit sum (or 0, if no such prime exists).
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1
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0, 11, 101, 0, 10111, 101111, 1011001, 10010101, 101001001, 1000001011, 10000001101, 100000010101, 1000100000101, 10000000001011, 100000000100101, 1000000000100011, 10000000000001101, 100000000001010001, 1000000000000010011
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