1

This number is a unit (so is neither prime nor composite).

Just showing those entries submitted by 'McAlee': (Click here to show all)

The only number that is exactly 1/2 prime. [McAlee]

If primes were called pints, then we could say, "1 is a half-pint." [McAlee]

George Bernard Riemann extended Euler's Zeta function to include the sans' simple pole at s = 1. [McAlee]