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Search: id:A120300
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| A120300 |
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Numbers n such that 10^n + 11131719 is prime. |
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1
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OFFSET
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1,1
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COMMENT
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11131719 is the concatenation of 11,13,17,19, the primes between 10 and 20, chosen because they appear on the Ishango prime bone. Notice the consecutive values of 40, 41 and 42 above. Also 10^12678+11131719 and 10^12104+11131719 are probable primes (Fermat and Lucas PRPs) that occur in this sequence.
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REFERENCES
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J. Earls, Red Zen, Lulu Press, NY, 2007, pp. 147-148. ISBN: 978-1-4303-2017-3.
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PROGRAM
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(PARI) for(n=1, 200, if(isprime(10^n+11131719), print1(n", ")))
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CROSSREFS
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Sequence in context: A036499 A107607 A102975 this_sequence A071566 A113802 A057123
Adjacent sequences: A120297 A120298 A120299 this_sequence A120301 A120302 A120303
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KEYWORD
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more,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), May 27 2007
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