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Search: id:A068816
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| A068816 |
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Primes formed by a 5 followed by 1's. |
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+0
1
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| 511111, 5111111111111, 5111111111111111, 51111111111111111111111111111111111111111111111111111111111111111111111111111111\ 11111, 51111111111111111111111111111111111111111111111111111111111111111111111111111111\ 11111111111111111111111111111111111111111111111111111111111111111
(list; graph; listen)
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OFFSET
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1,1
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PROGRAM
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(PARI) for(n=1, 200, if(isprime(5*10^n+(10^(n)-1)/9)==1, print1(5*10^n+(10^(n)-1)/9, ", ")))
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CROSSREFS
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Sequence in context: A046325 A136352 A138207 this_sequence A087096 A072959 A048527
Adjacent sequences: A068813 A068814 A068815 this_sequence A068817 A068818 A068819
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 07 2002
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EXTENSIONS
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More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 09 2002
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