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A108364
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Integers n such that 10^n - 33 is prime.
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0
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2, 3, 4, 10, 18, 46, 48, 121, 154, 158, 170, 196, 211, 250, 294, 316, 320, 663, 975, 1165, 1351, 4126, 4270, 5724, 7156, 15025, 19132, 25035, 36174, 77418
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OFFSET
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1,1
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COMMENTS
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See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable/proven prime - search on "99967".
The next term, if one exists, is >100000. [From Robert Price, Apr 25 2011]
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LINKS
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Table of n, a(n) for n=1..30.
Makoto Kamada, List of near-repdigit-related prime numbers.
Index entries for primes involving repunits.
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EXAMPLE
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If n=2 then 10^n - 33 = 67 (prime).
If n=48 then 10^n - 33 = 999999999999999999999999999999999999999999999967 (prime).
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MATHEMATICA
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For[n = 1, n < 1000, n++, If[PrimeQ[10^n - 33], Print[n]]] (Steinerberger)
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CROSSREFS
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Cf. A108330, A108328.
Sequence in context: A007661 A049891 A135432 * A145028 A085932 A214283
Adjacent sequences: A108361 A108362 A108363 * A108365 A108366 A108367
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KEYWORD
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more,nonn
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AUTHOR
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Parthasarathy Nambi, Jul 01 2005
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EXTENSIONS
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a(8)-a(21) from Stefan Steinerberger, Jan 28 2006
a(22)-a(29) extracted from Makoto Kamada website by Robert Price, Dec 06 2010
Edited by Ray Chandler, Dec 23 2010
a(30)=77418 from Robert Price, Apr 25 2011
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STATUS
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approved
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