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A109348
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Zsigmondy numbers for a = 7, b = 3: Zs(n, 7, 3) is the greatest divisor of 7^n - 3^n that is relatively prime to 7^m - 3^m for all positive integers m < n.
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5
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4, 5, 79, 29, 4141, 37, 205339, 1241, 127639, 341, 494287399, 2041, 24221854021, 82573, 3628081, 2885681, 58157596211761, 109117, 2849723505777919, 4871281, 8607961321, 197750389, 6842186811484434379, 5576881, 80962848274370701
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..25.
Eric Weisstein's World of Mathematics, Zsigmondy's Theorem
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CROSSREFS
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Cf. A064078-A064083, A109325, A109347, A109349.
Sequence in context: A013331 A226145 A042425 * A192084 A078985 A041173
Adjacent sequences: A109345 A109346 A109347 * A109349 A109350 A109351
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KEYWORD
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nonn
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AUTHOR
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Jonathan Vos Post, Aug 21 2005
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EXTENSIONS
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Edited, corrected and extended by Ray Chandler, Aug 26 2005
Definition corrected by Jerry Metzger, Nov 04 2009
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STATUS
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approved
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