CURATED BLOCKED QUESTION

Whether the proton decays

Grand unified theories predict proton decay; experiments have pushed the lower bound on the lifetime past 10^34 years. Testing further means instrumenting ever more protons for ever longer, since no single proton can be watched for its lifetime. Each order of magnitude costs a detector generation.

blocked by

timescale

This is a sourced, human-curated entry or a declared project limitation. It is not a computed discovery or an actionable hypothesis.