A121105 Trajectory of 679 under "x -> product of digits of x" map.

679, 378, 168, 48, 32, 6

Offset: 1

Author

N. J. A. Sloane, Aug 12 2006

Keywords

• nonn
• fini
• full
• base

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.

Crossrefs

Cf. A003001.

Programs

Mathematica

Most[FixedPointList[Times@@IntegerDigits[#]&,679,7]] (* Harvey P. Dale, Sep 13 2024 *)

Extensions

Edited by Charles R Greathouse IV, Aug 05 2010