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A263875
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a(n) = least positive k such that A263874(n) + 2^k is prime.
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3
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1, 2, 3, 4, 5, 8, 10, 20, 29, 955, 4583176, 9092392
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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A263874 gives where the records occur.
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LINKS
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PROG
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(PARI) a=1; forstep(n=1, 773, 2, k=1; while(!ispseudoprime(n+2^k), k++); if(k+1>a, print1(k, ", "); a=k+1));
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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