241

This number is a prime.

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The prime counting function π(241) = 53 uses the distinct-digit set {1, 2, 3, 4, 5} only, and 241 is the smallest prime with this property. Note that π(53) = 2^4*1. [Worrom]

Submitted: 2022-01-22 16:46:27; Last Modified: 2022-01-22 16:51:02.