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A128004
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Numbers n such that (38^n - 1)/37 is prime.
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9
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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Select[Prime[Range[100]], PrimeQ[(38^#-1)/37]&]
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PROG
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CROSSREFS
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KEYWORD
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hard,more,nonn
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AUTHOR
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EXTENSIONS
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a(5) corresponds to a probable prime discovered by Paul Bourdelais, Oct 17 2017
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STATUS
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approved
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