login
A167526
Prime factors of the speed of light in a vacuum, c = 299792458 (m/s).
1
2, 7, 73, 293339
OFFSET
1,1
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.
FORMULA
299792458 = 2 * 7 * 73 * 293339.
MATHEMATICA
FactorInteger[299792458][[All, 1]] (* Paolo Xausa, Jul 02 2024 *)
PROG
(PARI) factor(299 792 458)~[1, ]
CROSSREFS
Cf. A003678 (speed of light), A132997 (all divisors of c, contains this as subsequence).
Sequence in context: A215637 A119811 A319621 * A064646 A366407 A144905
KEYWORD
fini,full,nonn
AUTHOR
M. F. Hasler, Nov 18 2009
STATUS
approved