TEN HIGHEST NUMBERS I KNOW

As of today (January 18, 2015)
  1. 600
  2. 700
  3. 900 (?)
    This might not be a real one
  4. 10100
  5. 9100
  6. 90,9,99
  7. 9X/7
  8. Infinity minus 6
  9. 9
    Ten is the highest number I know. I'll update the list when I learn more!