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Search: id:A050903
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| A050903 |
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Numbers n such that 289*2^n-1 is prime. |
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+0
1
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| 1, 3, 13, 21, 25, 33, 73, 93, 115, 127, 397, 1255, 3751, 3801, 4771, 8997, 10063, 11253, 18663, 27525, 28009, 34041, 55693, 60243, 67891, 77391, 90201, 501991, 509401
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Also in the sequence: 610737, 728205, 1098117 - Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
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LINKS
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Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300
Wilfrid Keller, List of primes k.2^n - 1 for k < 300
Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime
Kosmaj, Riesel list k<300.
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CROSSREFS
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Sequence in context: A055202 A099502 A055059 this_sequence A117766 A057589 A135580
Adjacent sequences: A050900 A050901 A050902 this_sequence A050904 A050905 A050906
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KEYWORD
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hard,nonn
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AUTHOR
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njas, Dec 29 1999
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EXTENSIONS
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More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
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