Sums of Squares/Mistake/Second Edition

Source Work

 * $\mathbf C$: Additive Number Theory
 * $\mathbf {C 20}$: Sums of Squares
 * $\mathbf {C 20}$: Sums of Squares

Mistake

 * Apart from $256$ examples, the largest of which is $1167$, every number can be expressed as the sum of at most five composite numbers.

Correction
It should say:
 * Apart from $256$ examples, the largest of which is $1167$, every number can be expressed as the sum of at most five squares of composite numbers.

(emphasis added)

This has been corrected for.

Also see

 * Numbers Not Expressible as Sum of no more than $5$ Squares of Composite Numbers