5 definitions
Riemann Hypothesis (n.) is the unproven claim a hundred other theorems quietly lean on.
Riemann Hypothesis (n.) is a problem so famous that a partial result gets treated like a sighting.
Riemann Hypothesis (n.) is mathematics' most famous IOU: whole papers say 'assuming this is true'.
Riemann Hypothesis (n.) is a bet that the primes, for all their chaos, keep their zeros in a straight line.
Riemann Hypothesis (n.) is a guess about primes that has outlived every mathematician who bet on it.