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A127430
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Primes p such that 6p-5 and 6p+5 all also primes.
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8
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2, 3, 7, 11, 13, 17, 31, 41, 59, 71, 73, 97, 113, 139, 157, 193, 239, 269, 277, 311, 337, 349, 421, 449, 487, 577, 587, 619, 643, 701, 811, 823, 827, 941, 977, 1021, 1051, 1093, 1217, 1249, 1259, 1361, 1373, 1471, 1571, 1721, 1723, 1747, 1777, 1789, 1861, 1907
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| Example: 11, 6*11+5=71, 6*11-5=61 are all primes.
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MATHEMATICA
| Select[Range[5000], PrimeQ[ # ] && PrimeQ[6# + 5] && PrimeQ[6# - 5] &]
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PROG
| (MAGMA) [ p: p in PrimesUpTo(9000) | IsPrime(6*p-5) and IsPrime(6*p+5)] [From Vincenzo Librandi, Jan 29 2011]
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CROSSREFS
| Sequence in context: A045321 A045322 A023221 * A171595 A106483 A145673
Adjacent sequences: A127427 A127428 A127429 * A127431 A127432 A127433
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KEYWORD
| nonn
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AUTHOR
| Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 31 2007
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