3
This number is a prime.
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Jason Funk © 2002 |

The smallest prime p such that
π(p2) = (π(p))2. [Capelle]
It is conjectured that the Erdős-Moser equation
1k+2k+...+(m-1)k
= mk has an integer solution
only for m = 3: 11 +
21 =
31. [Capelle]
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