Prime Curios!: 19

19
(another Prime Pages' Curiosity)

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Waring conjectured in 1770 that every positive integer can be expressed as a sum of at most 19 biquadrates (fourth powers). This was later proven by Balasubramanian, Deshouillers, and Dress.

Submitted: 1999-09-02 18:40:00; Last Modified: 2008-06-06 16:55:59.