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 A066306 Prime numbers such that sum of digits equals product of digits. 9
 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; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Chai Wah Wu, Table of n, a(n) for n = 1..8552 EXAMPLE 2141 = p[323], 2*1*4*1 = 8 = 2+1+4+1. MATHEMATICA f[n_] := IntegerDigits[ Prime[n]]; Prime[ Select[ Range[ PrimePi[10^10]], Apply[Plus, f[ # ]] == Apply[Times, f[ # ]] & ]] PROG (Magma) [NthPrime(n): n in [1..2*10^4] | &+Intseq(NthPrime(n)) eq &*Intseq(NthPrime(n))]; // Vincenzo Librandi, Nov 18 2015 CROSSREFS Primes from A034710. Cf. A000040, A061672, A066307. Sequence in context: A090721 A224164 A224398 * A212667 A252357 A037948 Adjacent sequences: A066303 A066304 A066305 * A066307 A066308 A066309 KEYWORD nonn,base AUTHOR Labos Elemer, Dec 13 2001 EXTENSIONS More terms from Robert G. Wilson v, Dec 27 2001 STATUS approved

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Last modified September 18 08:01 EDT 2024. Contains 375996 sequences. (Running on oeis4.)