I just completed "Rambunctious Recitation" - Day 15 - Advent of Code 2020 https://adventofcode.com/2020/day/15 #AdventOfCode

https://github.com/coderbyheart/adventofcode/blob/cb1190d0cd89507b9f2bc681aedbafc18242973b/day15/memoryGame.ts

Part 2 takes 5 minutes, which is probably a JavaScript thing. I tried to look for repeating numbers, but the list just keeps growing ...