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Search: id:A087340
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| A087340 |
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Primes p such that the sum of the digits of p as well as 1 plus the product of its digits are also primes. |
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+0
2
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| 2, 11, 23, 29, 41, 43, 47, 61, 67, 89, 223, 227, 229, 263, 269, 281, 463, 643, 661, 821, 827, 883, 887, 1123, 1129, 1163, 1213, 1231, 1237, 1279, 1291, 1297, 1321, 1327, 1361, 1367, 1433, 1439, 1453, 1459, 1471, 1493, 1523, 1543, 1549, 1567, 1613, 1637
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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A066725 INTERSECT A046704. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 26 2007
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MATHEMATICA
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Select[Select[Prime[Range[280]], PrimeQ[Plus@@IntegerDigits[ # ]]&], PrimeQ[Times@@IntegerDigits[ # ]+1]&] (from Harvey Dale)
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CROSSREFS
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Cf. A087339.
Sequence in context: A045386 A084354 A066725 this_sequence A106927 A085745 A106856
Adjacent sequences: A087337 A087338 A087339 this_sequence A087341 A087342 A087343
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 06 2003
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 07 2003
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