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Search: id:A070694
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| A070694 |
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Numbers n such that n+1, n^2+1, n^4+1, n^8+1 and n^16+1 are primes. |
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+0
1
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| 1, 2, 337536, 585106, 602056, 2071960, 11861410, 20706120, 54020170, 72696726, 87584646, 89445636, 95895930, 98583340, 98595070, 112204200, 205739220, 279448296, 292582836, 337969690, 349672456, 432972780, 437874186, 474186576
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OFFSET
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1,2
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MATHEMATICA
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Do[ If[ PrimeQ[n + 1] && PrimeQ[n^2 + 1] && PrimeQ[n^4 + 1] && PrimeQ[n^8 + 1] && PrimeQ[n^16 + 1], Print[n]], {n, 1, 10^7}]
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CROSSREFS
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Sequence in context: A124362 A058435 A151606 this_sequence A158346 A018854 A139181
Adjacent sequences: A070691 A070692 A070693 this_sequence A070695 A070696 A070697
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KEYWORD
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nonn,new
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), May 13 2002
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EXTENSIONS
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a(7)-a(24) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 02 2009
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