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A046514
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Numbers with multiplicative persistence value 5.
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5
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679, 688, 697, 769, 796, 868, 886, 967, 976, 1679, 1688, 1697, 1769, 1796, 1868, 1886, 1967, 1976, 2379, 2388, 2397, 2468, 2486, 2648, 2684, 2688, 2739, 2777, 2793, 2838, 2846, 2864, 2868, 2883, 2886, 2937, 2973, 3279, 3288, 3297, 3367, 3376, 3448
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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EXAMPLE
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2777 -> [ 686 ][ 288 ][ 128 ][ 16 ][ 6 ] -> one digit in five steps.
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MAPLE
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mp:= proc(n) option remember;
if n <= 9 then return 0 fi;
1+procname(convert(convert(n, base, 10), `*`))
end proc:
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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