Since a couple of years ago the tweet limit was bumped to 280 characters, so I assume the amount is double of what you calculated.
10 karma · joined October 12, 2012
Number.prototype.to = function(to){r=[]; for(var i=this+0; i<=to; i++){ r.push(i)} return r;}
1..to(5) //[1,2,3,4,5]