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A164063
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Prime p1 of the form a^b - c^d = p1, where a, b, c, d are primes and a + b + c + d = p2, where p2 (A164064) is prime and conc(abcd) = p3 (concatenation of a, b, c, d) is also prime (A164065).
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2
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OFFSET
| 1,1
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EXAMPLE
| 2^7 - 5^3 = 3, 2 + 7 + 5 + 3 = 17, conc (abcd) = 2753; 3^3 - 2^3 = 19, 3 + 3 + 2 + 3 = 11, conc (abcd) = 3323; 31^3 - 2^11 = 27743, 31 + 3 + 2 + 11 = 47, conc (abcd) = 313211; 31^3 - 2^7 = 29663, 31 + 3 + 2 + 7 = 43, conc (abcd) = 31327;
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CROSSREFS
| Sequence in context: A098796 A120563 A191623 * A092828 A117844 A067607
Adjacent sequences: A164060 A164061 A164062 * A164064 A164065 A164066
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KEYWORD
| nonn,base
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AUTHOR
| Oleg Zyakun (opz(AT)list.ru), Aug 12 2009
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