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

Full prime factorization: [[2]] * [[5]]

Factor pairs:

[[10]] = [[2]] * [[5]]

Proper divisors: [[2]], [[5]]

Primes up to 10: [[2]], [[3]], [[5]], [[7]].

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

The closest centered hexagonal numbers are [[7]] (index # [[2]]) and [[19]] (index # [[3]]).

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/10]] is closest to [[D#-1]] at [[10]] Hz (+49 cents).

Note class: [[D#]], Octave: [[octave/-1]].

• [[square]]: 100

• [[square root]]: 3.1623

• [[cube]]: 1000

• [[cube root]]: 2.1544

• [[natural log]] (ln): 2.3026

• [[base-10 log]] (log10): 1.0000

• [[base-2 log]] (log2): 3.3219