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A324941
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Largest prime factor of 17^n + 1.
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2
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2, 3, 29, 13, 41761, 101, 83233, 22796593, 184417, 5653, 63541, 87415373, 72337, 2001793, 100688449, 238212511, 52548582913, 45957792327018709121, 382069, 20352763, 1186844128302568601, 88109799136087, 6901823633, 1109309383381084655697725873, 48661191868691111041
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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[17^n + 1] [[-1, 1]], {n, 0, 30}]
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PROG
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(Magma) [Maximum(PrimeDivisors(17^n + 1)): n in [0..40]];
(PARI) a(n) = vecmax(factor(17^n+1)[, 1]); \\ Jinyuan Wang, Apr 05 2019
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CROSSREFS
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Cf. A002587, A074476, A274903, A074478, A274904, A227575, A274905, A002592, A003021, A062308, A002590.
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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