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Search: id:A090188
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| A090188 |
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Primes P such that P=k*p(n)#-p(n+1) is prime for least k. Here p(i)# denotes ith-primorial and p(i) denotes ith-prime. |
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1
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| 3, 7, 23, 199, 2297, 30013, 1021001, 9699667, 669278581, 32348466119, 401120980223, 29682952539199, 1825501581163217, 3924823995010043, 3074448912942456997, 228124109340330313051, 49991769104009528615759
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OFFSET
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1,1
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COMMENT
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k*p(n)#-p(n+1) is the greatest prime < k*p(n)#-p(n+1)-1 and if k*p(n)#-p(n+1)-1 is not prime it is the greatest prime < k*p(n)#-p(n+1) k is given in one other sequence
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EXAMPLE
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1*2*3*5*7*11*13-17=30013, 1*p(6)#-p(7)=30013, 1 is the least k for n=6
30013 is prime P for n=6
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CROSSREFS
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Sequence in context: A113824 A121883 A060235 this_sequence A001773 A067604 A090118
Adjacent sequences: A090185 A090186 A090187 this_sequence A090189 A090190 A090191
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KEYWORD
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base,nonn
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AUTHOR
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Pierre CAMI (colettecami(AT)aol.com), Jan 21 2004
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