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A121105
Trajectory of 679 under "x -> product of digits of x" map.
1
679, 378, 168, 48, 32, 6
OFFSET
1,1
COMMENTS
This is the smallest number of persistence 5 (cf. A003001).
LINKS
N. J. A. Sloane, The persistence of a number, J. Recreational Math., 6 (1973), 97-98.
MATHEMATICA
Most[FixedPointList[Times@@IntegerDigits[#]&, 679, 7]] (* Harvey P. Dale, Sep 13 2024 *)
CROSSREFS
Cf. A003001.
Sequence in context: A250872 A186127 A097771 * A046514 A199995 A352263
KEYWORD
nonn,fini,full,base
AUTHOR
N. J. A. Sloane, Aug 12 2006
EXTENSIONS
Edited by Charles R Greathouse IV, Aug 05 2010
STATUS
approved