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Search: id:A064078
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A064078 Zsigmondy numbers for a = 2, b = 1: Zs(n, 2, 1) is the greatest divisor of 2^n - 1^n (A000225) that is relatively prime to 2^m - 1^m for all positive integers m < n. +0
17
1, 3, 7, 5, 31, 1, 127, 17, 73, 11, 2047, 13, 8191, 43, 151, 257, 131071, 19, 524287, 41, 337, 683, 8388607, 241, 1082401, 2731, 262657, 3277, 536870911, 331, 2147483647, 65537, 599479, 43691, 8727391, 4033, 137438953471, 174763, 9588151, 61681 (list; graph; listen)
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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