This must be done in Quickplay+ or Competitive. Quest doesn't keep track of score anyway.
This could theoretically be done on any instrument but it's near impossible to get exact scores on drums or vocals. For the purpose of this solution, you'll need to do this on Guitar or Bass.
The easiest way to do this is to download one of the premade tracks on GH Tracks.
This is found under "Create" then GH Tracks.
Use the Search feature on GH Tracks and search for "133337" and you will get a few results for this.
Simply download one of these and hit 100% (without breaking streak) of the notes in this song and you should get exactly 133,337 points.
There will be a held note in this song somewhere, it is important that you hold the held note for the entire duration to get your score ending in 37
Some of the songs are harder than others, some are faster and use chords, where as some are made easier and much longer in length.
Trophy will pop up at the end of the song, provided you have scored the exact amount.
You may also get this trophy along with it.