Talk:Congruum

A fact from Congruum appeared on Wikipedia's Main Page in the Did you know column on 2 January 2015 (check views). The text of the entry was as follows:

Did you know... that Fermat's only complete proof shows there is no integer right triangle with square area, pair of integer right triangles sharing two sides, or square gap between three equally spaced squares?

A record of the entry may be seen at Wikipedia:Recent additions/2015/January. The nomination discussion and review may be seen at Template:Did you know nominations/Fermat's right triangle theorem.

Wikipedia

216

If the statement that every congruum can be expressed as 4mn(m^2-n^2) is true, how does one represent 216? Sorry if I'm being naïve here, but I can't find a solution. Am I misunderstanding the statement? Pieater3.14159265 (talk) 21:46, 9 July 2015 (UTC)[reply]

It appears to be a mistake. To get every congruum you might need to multiply an expression of this form by a square. E.g. for 216, you can express 24 as this form, and then multiply by 9. —David Eppstein (talk) 22:58, 9 July 2015 (UTC)[reply]

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