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Search: id:A066306
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| A066306 |
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Prime numbers such that sum of digits equals product of digits. |
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+0
5
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| 2, 3, 5, 7, 2141, 2411, 4211, 11251, 12511, 15121, 21221, 25111, 1112171, 1127111, 1172111, 1271111, 7112111, 11112811, 11128111, 11218111, 12111811, 12118111, 12181111, 18211111, 81111211, 81112111
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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2141=p[323], 2.1.4.1=8=2+4+1+1.
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MATHEMATICA
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f[n_] := IntegerDigits[ Prime[n]]; Prime[ Select[ Range[ PrimePi[10^10]], Apply[Plus, f[ # ]] == Apply[Times, f[ # ]] & ]]
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CROSSREFS
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Primes from A034710.
Cf. A061672, A000040, A066307.
Sequence in context: A109208 A050665 A090721 this_sequence A007659 A037948 A145380
Adjacent sequences: A066303 A066304 A066305 this_sequence A066307 A066308 A066309
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KEYWORD
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base,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Dec 13 2001
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 27 2001
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