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A023147
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Numbers n such that prime(n) == 5 (mod n).
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11
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1, 2, 3, 9, 16, 33, 40073, 40078, 40082, 40083, 40122, 251721, 251722, 251734, 251736, 4124584, 10553433, 10553439, 10553444, 10553454, 10553478, 10553552, 10553553, 10553818, 27067098, 27067524, 179992912, 465769814, 465769832, 465769839
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..30.
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MATHEMATICA
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NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; p = 1; Do[ If[ Mod[p = NextPrim[p], n] == 5, Print[n]], {n, 1, 10^9}] (from Robert G. Wilson v Feb 18 2004)
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CROSSREFS
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Cf. A092047, A023143, A023144, A023145, A023146, A023148, A023149, A023150, A023151, A023152.
Sequence in context: A092638 A206777 A173809 * A220123 A220125 A095742
Adjacent sequences: A023144 A023145 A023146 * A023148 A023149 A023150
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KEYWORD
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nonn
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AUTHOR
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David W. Wilson
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EXTENSIONS
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More terms from Robert G. Wilson v, Feb 18 2004
a(24)-a(27) from Robert G. Wilson v, Feb 18 2004
Three missing initial terms at start of sequence inserted by Zak Seidov, Feb 05 2009
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STATUS
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approved
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