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Search: id:A103069
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| A103069 |
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Numbers n such that 8*10^n + 3 is prime. |
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+0
2
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OFFSET
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1,2
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LINKS
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Makoto Kamada, Factorizations of 800...003.
Sabin Tabirca and Kieran Reynolds, Lacunary Primes.
Index entries for primes involving repunits.
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EXAMPLE
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For n = 1 we have 7*10^1+3 = 7*10+3 = 73, which is prime.
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MATHEMATICA
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Do[ If[ PrimeQ[ 8*10^n + 3], Print[ n ]], {n, 0, 10000}]
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CROSSREFS
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Sequence in context: A039463 A142096 A075936 this_sequence A141877 A057230 A142177
Adjacent sequences: A103066 A103067 A103068 this_sequence A103070 A103071 A103072
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KEYWORD
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more,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 19 2005
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