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A023149
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Numbers k such that prime(k) == 7 (mod k).
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13
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1, 2, 4, 6, 18, 36, 78, 191, 6456, 6457, 40080, 40081, 637324, 637326, 637344, 10553425, 10553434, 10553477, 10553502, 10553573, 10553854, 27066988, 27067126, 69709680, 69709736, 69709940, 465769818, 3140421716, 3140421740, 3140421743
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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p = 1; Do[ If[ Mod[p = NextPrime[p], n] == 7, Print[n]], {n, 1, 10^9}] (* Robert G. Wilson v, Feb 18 2004 *)
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PROG
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(Sage)
terms = []
p = 2
for n in range(1, max+1) :
if (p - 7) % n == 0 : terms.append(n)
p = next_prime(p)
return terms
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CROSSREFS
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Cf. A171434, A092049, A023143, A023144, A023145, A023146, A023147, A023148, A023150, A023151, A023152.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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