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A136669
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Primes of the form colossally abundant number - 1.
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1
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5, 11, 59, 359, 5039, 55439, 1441439, 135483209545341953934626770390607999, 21406347108164028721671029721716063999, 6223083124956116561507895939157782409673929631999, 78232234099885463677928129398618807521962436643076243437332696602750813193299417065162966120702842438719999
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OFFSET
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1,1
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COMMENTS
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The n-th colossally abundant number - 1 is prime for n = 2, 3, 4, 6, 8, 9, 11, 34, 36, 43, 73, 81, 86, 115.
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LINKS
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FORMULA
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EXAMPLE
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A004490(11) = 1441440, and 1441440 - 1 = 1441439 is prime.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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