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A048518
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Primes containing only two distinct digits whose sum of digits is 28, the second perfect number.
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2
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1999, 9199, 338383, 383833, 1181881, 1881181, 1881811, 2222929, 2922229, 8118181, 8188111, 8881111, 9222229, 15551551, 15555151, 15555511, 16166611, 16616161, 33333373, 33733333, 34434343, 44334343, 44343433, 51155551, 51515551, 55155151, 55155511, 55515151
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OFFSET
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1,1
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COMMENTS
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Calculated by Robert T. McQuaid (robert.mcquaid(AT)headwaters.com).
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LINKS
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C. Rivera, Source from Carlos Rivera's Puzzle Site.
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MATHEMATICA
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Select[Prime[Range[3100000]], Count[DigitCount[#], 0]==8&&Total[ IntegerDigits[ #]]==28&] (* Harvey P. Dale, Jun 11 2016 *)
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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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