Numbers Not Expressible as Sum of no more than 5 Squares of Composite Numbers/Mistake

Source Work

1997: David Wells: Curious and Interesting Numbers (2nd ed.):

The Dictionary

$1167$

Mistake

[$1167$ is] The largest of $256$ numbers which cannot be expressed as the sum of at most $5$ composite numbers. [Guy 136]

Correction

This should say:

[$1167$ is] The largest of $256$ numbers which cannot be expressed as the sum of at most $5$ squares of composite numbers. [Guy 136]

(emphasis added)

The mistake appears in (and has been copied from) Richard K. Guy's Unsolved Problems in Number Theory, 2nd ed. of $1994$.

However, in Unsolved Problems in Number Theory, 3rd ed. this has been corrected.

Sources

• 1994: Richard K. Guy: Unsolved Problems in Number Theory (2nd ed.): $\mathbf C$: Additive Number Theory: $\mathbf {C 20}$: Sums of Squares
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $1167$