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A087886
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Numbers n such that 29^n + 2 is prime.
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6
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0, 1, 3, 63, 87, 189, 239, 605, 2099, 3667, 5029, 20025, 45285, 99167
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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LINKS
| Henri & Renaud Lifchitz, PRP Records.
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EXAMPLE
| a(1) = 1 is a member because 29^1 + 2 = 31 is prime.
29^3+2 = 24391 is prime, so 3 is in the sequence.
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PROG
| (PARI) for( n = 0, 239, if( isprime( 29^n +2), print( n), ))
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CROSSREFS
| Cf. A051783, n such that 3^n +2 is prime.
Cf. A087885, 5^n +2 is prime.
Sequence in context: A104403 A144422 A135444 * A123754 A048354 A046181
Adjacent sequences: A087883 A087884 A087885 * A087887 A087888 A087889
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KEYWORD
| nonn,more
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AUTHOR
| Donald S. McDonald (don.mcdonald(AT)paradise.net.nz), Oct 13 2003
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EXTENSIONS
| 605 from Mark Hudson (mrmarkhudson(AT)hotmail.com), Sep 07 2004
{2099, 3667, 5029}, corresponding to probable primes, from Ryan Propper (rpropper(AT)stanford.edu), Jul 03 2005
Edited by T. D. Noe (noe(AT)sspectra.com), Oct 30 2008
20025 from Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 01 2011
45285 from Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 02 2011
99167 from Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 08 2011
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