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A068220
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Twin primes belonging to packs of four or more twin pairs.
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0
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9419, 9421, 9431, 9433, 9437, 9439, 9461, 9463, 62969, 62971, 62981, 62983, 62987, 62989, 63029, 63031, 72221, 72223, 72227, 72229, 72251, 72253, 72269, 72271, 392261, 392263, 392267, 392269, 392279, 392281, 392297, 392299, 495569
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OFFSET
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1,1
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COMMENTS
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A twin pack of primes contains 2 or more pairs of twin primes, between which pairs there are no other primes. 9419,9421,9431,9433,9437,9439,9461,9463 are in the sequence because they are consecutive primes which belong to more than 3 twin pairs. 137,139,149,151 are not because they belong to a pack of only 2 pairs.
Could be called unrestricted prime octets. - Harry J. Smith, Dec 16 2007
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LINKS
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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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