[[6]] is not prime (composite). Want proof? :)

Full prime factorization: [[2]] * [[3]]

Factor pairs:

[[6]] = [[2]] * [[3]]

Proper divisors: [[2]], [[3]]

Primes up to 6: [[2]], [[3]], [[5]].

[[6]] is not a centered hexagonal number.

The closest centered hexagonal numbers are [[1]] (index # [[1]]) and [[7]] (index # [[2]]).

First 20 centered hexagonal numbers: [[1]], [[7]], [[19]], [[37]], [[61]], [[91]], [[127]], [[169]], [[217]], [[271]], [[331]], [[397]], [[469]], [[547]], [[631]], [[721]], [[817]], [[919]], [[1027]], [[1141]].

[[hz/6]] is closest to [[G-2]] at [[6]] Hz (-36 cents).

Note class: [[G]], Octave: [[octave/-2]].

• [[square]]: 36

• [[square root]]: 2.4495

• [[cube]]: 216

• [[cube root]]: 1.8171

• [[natural log]] (ln): 1.7918

• [[base-10 log]] (log10): 0.7782

• [[base-2 log]] (log2): 2.5850