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A103070
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Numbers n such that 8*10^n + 9 is prime.
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1
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1, 2, 3, 6, 12, 20, 21, 37, 42, 55, 60, 98, 100, 104, 223, 237, 260, 501, 570, 600, 698, 8857, 20911, 24345, 31964, 67742
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Makoto Kamada, Factorizations of 800...009.
Sabin Tabirca and Kieran Reynolds, Lacunary Prime Numbers.
Index entries for primes involving repunits.
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MATHEMATICA
| Do[ If[ PrimeQ[ 8*10^n + 3], Print[ n ]], {n, 0, 10000}]
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CROSSREFS
| Sequence in context: A093687 A000423 A007335 * A079708 A096571 A081156
Adjacent sequences: A103067 A103068 A103069 * A103071 A103072 A103073
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KEYWORD
| more,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 19 2005
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EXTENSIONS
| a(23)-a(26) from Kamada data by Robert Price (pamandbobprice(AT)yahoo.com), Dec 14 2010
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