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

Full prime factorization: [[2]] * [[2]] * [[7]] * [[11]]

Factor pairs:

[[308]] = [[2]] * [[154]]

[[308]] = [[4]] * [[77]]

[[308]] = [[7]] * [[44]]

[[308]] = [[11]] * [[28]]

[[308]] = [[14]] * [[22]]

Proper divisors: [[2]], [[4]], [[7]], [[11]], [[14]], [[22]], [[28]], [[44]], [[77]], [[154]]

Primes up to 308: [[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]], [[107]], [[109]], [[113]], [[127]], [[131]], [[137]], [[139]], [[149]], [[151]], [[157]], [[163]], [[167]], [[173]], [[179]], [[181]], [[191]], [[193]], [[197]], [[199]], [[211]], [[223]], [[227]], [[229]], … (63 total).

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

The closest centered hexagonal numbers are [[271]] (index # [[10]]) and [[331]] (index # [[11]]).

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/308]] is closest to [[D#4]] at [[308]] Hz (-17 cents).

Note class: [[D#]], Octave: [[octave/4]].

• [[square]]: 94864

• [[square root]]: 17.5499

• [[cube]]: 29218112

• [[cube root]]: 6.7533

• [[natural log]] (ln): 5.7301

• [[base-10 log]] (log10): 2.4886

• [[base-2 log]] (log2): 8.2668