41

This number is a prime.

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prime(1)^π(1) + prime(2)^π(2) + ... + prime(41)^π(41) is an emirp and 41 is the only multidigit number with this property. [Firoozbakht]

Submitted: 2010-07-19 15:31:41; Last Modified: 2020-07-03 17:45:18.