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A135132
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Integers n such that 10^n + 73 is a prime number.
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1
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OFFSET
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1,2
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COMMENTS
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a(5) to a(7) were certified prime with PRIMO. - Bernardo Boncompagni, Nov 07 2008
The next term (if one exists) is > 100000. - Robert Price, Apr 25 2011
See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10073".
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LINKS
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Table of n, a(n) for n=1..10.
Makoto Kamada, List of near-repdigit-related prime numbers.
Index entries for primes involving repunits.
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EXAMPLE
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8 is a member because 10^8+73 = 100000000+73 = 100000073, which is prime.
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MATHEMATICA
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Select[Range[1000], PrimeQ[10^# + 73] &] (* G. C. Greubel, Sep 28 2016 *)
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CROSSREFS
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Cf. A095688, A108052, A108050, A108312, A107083, A108049, A108054.
Sequence in context: A332098 A254313 A209429 * A178060 A007543 A352549
Adjacent sequences: A135129 A135130 A135131 * A135133 A135134 A135135
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KEYWORD
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more,nonn
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AUTHOR
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Julien Peter Benney (jpbenney(AT)gmail.com), Feb 12 2008
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EXTENSIONS
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a(7) from Bernardo Boncompagni, Nov 07 2008
Added term 13015. Robert Price, Mar 22 2010
Added two terms: 3518,6211. Robert Price, Oct 10 2010
Edited by Ray Chandler, Dec 23 2010
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STATUS
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approved
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