Ciao.
Se ho la seguente regex

alert(/^[0-9]+,[0-9]{2,}$/.test(n));

con
var n= '2,275';

ottengo true

{n,}
Where n is a positive integer. Matches at least n occurrences of the
preceding item.

For example, /a{2,} doesn't match the 'a' in "candy", but matches all
of the a's in "caandy" and in "caaaaaaandy."
ma allora come fare ?