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Yes, there are prime numbers which consists of the digit 1. In addition to the number 11, 13, 17, 19, 31, 101, 107, 109, 113, 127, 131, 179, 181, 191, 193, 197, 199, 211, and 311 are prime numbers.

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Q: Is there any prime number that its digits consists of 1s except 11?
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