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A050559
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Numbers k such that 67*2^k-1 is prime.
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0
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5, 9, 21, 45, 65, 77, 273, 677, 1049, 1721, 17105, 18645, 27761, 61661, 79773, 403461, 527037, 722805
(list;
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listen;
history;
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internal format)
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Select[Range[1000], PrimeQ[67*2^# - 1] & ] (* Robert Price, Dec 22 2018 *)
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PROG
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CROSSREFS
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KEYWORD
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hard,nonn,more
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AUTHOR
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EXTENSIONS
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More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
a(18) from the Wilfrid Keller link by Robert Price, Dec 22 2018
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STATUS
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approved
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