Which number, discovered in December 2018, was at that time the largest known prime?

1. A Option A: 2^82,589,933 − 5
2. B Option B: 2^82,589,933 − 1
3. C Option C: 2^82,589,933 − 3
4. D Option D: None of these

Answer checked 11 October 2026 · How we write and check questions