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A062308
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Largest prime factor of 11^n+1 (A034524).
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7
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2, 3, 61, 37, 7321, 13421, 1117, 1623931, 6304673, 590077, 212601841, 58367, 20113, 59583967, 55527473, 7537711, 447600088289, 2218331, 3138426605161, 1390636259, 1120648576818041, 3421169496361, 2649263870814793
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OFFSET
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0,1
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LINKS
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FORMULA
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MATHEMATICA
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Table[FactorInteger[11^n + 1][[-1, 1]], {n, 0, 20}] (* Vincenzo Librandi, Jul 12 2016 *)
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PROG
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(PARI) for(n=0, 22, print(factor(11^n+1)))
(PARI) { for (n=0, 80, f=factor(11^n + 1)~; write("b062308.txt", n, " ", f[1, length(f)]) ) } \\ Harry J. Smith, Aug 04 2009
(Magma) [Maximum(PrimeDivisors(11^n+1)): n in [0..40]]; // Vincenzo Librandi, Jul 12 2016
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CROSSREFS
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Cf. similar sequences listed in A274903.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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a(302)-a(325) in b-file from Max Alekseyev, Apr 25 2022, Oct 11 2023
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STATUS
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approved
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