Comment by kittenfluff

Responds "Yes" to

  9007199254740990, 9007199254740991, 9007199254740992

but "No" to

  9007199254740991, 9007199254740992, 9007199254740993

Presumably this is due to how Javascript handles integers, i.e. it uses the integer part of a float64, to wit

  > parseInt('9007199254740992')
  9007199254740992
  > parseInt('9007199254740993')
  9007199254740992

Edit: I think this is the code that actually reads the numbers the user enters, see [0]

  function l(){
      var a=h.exec(m[1]),f=null,g=null,n=null;
      return a&&(null!==a[1]&&a[1]&&(f=parseInt(a[1],10)),
          null!==a[2]&&a[2]&&(g=parseInt(a[2],10)),
          null!==a[3]&&a[3]&&(n=parseInt(a[3],10))),
      new e(f,g,n)
  }

Edit(2): Actually, I'm not so sure that's the correct code at all. They NYT game is capable of parsing floats correctly (e.g. it accepts 1.1, 1.2, 1.3 as a "Yes") so it's not just using parseInt.

[0] http://a1.nyt.com/assets/interactive/20150612-151638/js/foun...