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

Full prime factorization: [[2]] * [[2]] * [[2]] * [[13]]

Factor pairs:

[[104]] = [[2]] * [[52]]

[[104]] = [[4]] * [[26]]

[[104]] = [[8]] * [[13]]

Proper divisors: [[2]], [[4]], [[8]], [[13]], [[26]], [[52]]

Primes up to 104: [[2]], [[3]], [[5]], [[7]], [[11]], [[13]], [[17]], [[19]], [[23]], [[29]], [[31]], [[37]], [[41]], [[43]], [[47]], [[53]], [[59]], [[61]], [[67]], [[71]], [[73]], [[79]], [[83]], [[89]], [[97]], [[101]], [[103]].

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

The closest centered hexagonal numbers are [[91]] (index # [[6]]) and [[127]] (index # [[7]]).

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/104]] is closest to [[G#2]] at [[104]] Hz (+3 cents).

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

• [[square]]: 10816

• [[square root]]: 10.1980

• [[cube]]: 1124864

• [[cube root]]: 4.7027

• [[natural log]] (ln): 4.6444

• [[base-10 log]] (log10): 2.0170

• [[base-2 log]] (log2): 6.7004