6578 = 1^{4} + 2^{4} + 9^{4} = 3^{4} + 7^{4} + 8^{4}

Smallest number represented as sum three 4th powers in two ways.

...

2^{6} - 1 = 31 = 3 * 3 * 7

Undergraduate Texts in Mathematics

Graduate Studies in Mathematics

6578 = 1^{4} + 2^{4} + 9^{4} = 3^{4} + 7^{4} + 8^{4}

Smallest number represented as sum three 4th powers in two ways.

...

2^{6} - 1 = 31 = 3 * 3 * 7

Undergraduate Texts in Mathematics

Graduate Studies in Mathematics