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Search: id:A125035
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| A125035 |
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Numbers n such that gcd(2^n-69,n)>1. |
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+0
1
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| 10, 26, 30, 50, 67, 70, 88, 90, 110, 130, 136, 150, 170, 182, 183, 185, 190, 198
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Corresponding gcd's are 5,13,5,5,67,5,11,5,5,5,17,5,5,13,61,37,5,11. Cf. A125034, A124977.
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EXAMPLE
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gcd(2^10-69,10)=gcd(1024-69,10)=gcd(955,10)=5>1. Note that 67|(2^67-69).
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MATHEMATICA
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Select[Range[7, 100], PrimeQ[2^#-69]&]
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CROSSREFS
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Cf. A124977, A125034.
Sequence in context: A078257 A059198 A046961 this_sequence A067264 A043342 A023715
Adjacent sequences: A125032 A125033 A125034 this_sequence A125036 A125037 A125038
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Nov 17 2006
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