1739

This number is a composite.

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prime(1)^1739 + prime(7)^1739 + prime(3)^1739 + prime(9)^1739 is prime. It is the only known multidigit number with this property. [Firoozbakht]

Submitted: 2010-06-20 23:58:47; Last Modified: 2025-12-24 00:26:54.