- D 11876
- h 18422
- R 5373
- G 19114
- S ?
What number is represented by the question mark?
These are..
..the top ranked users of the Puzzling Stack Exchange and their user id's.
Deusovi user:11876
hexomino user:18422
Rand al'Thor user:5373
Gareth McCaughan user:19114
And the fifth..
Stiv user:60644