A167526 Prime factors of the speed of light in a vacuum, c = 299792458 (m/s).

2, 7, 73, 293339

Offset: 1

Author

M. F. Hasler, Nov 18 2009

Keywords

• fini
• full
• nonn

Comments

Note that each prime factor of 299792458 appears with multiplicity 1 in this number.

Giving the speed of light in km/s or cm/s would yield the same prime factors > 5. If time is measured in hours, or distance in miles, feet, inches or similar, then the numerical value of c is no longer an integer.

Crossrefs

Cf. A003678 (speed of light), A132997 (all divisors of c, contains this as subsequence).

Programs

Mathematica

FactorInteger[299792458][[All, 1]] (* Paolo Xausa, Jul 02 2024 *)

PARI

factor(299 792 458)~[1,]

Formula

299792458 = 2 * 7 * 73 * 293339.