Riffle located (500 solvers):
September 08, 2022
Riffle located (1000 solvers):
February 08, 2023
Riffle located (1500 solvers):
September 05, 2023
Riffle located (2000 solvers):
February 14, 2024
Riffle located (2500 solvers):
August 19, 2024
2820 / 3000