A106090 Prime numbers p such that 10p+7 and 7p+10 are primes.
3, 13, 31, 67, 79, 109, 163, 223, 229, 241, 277, 367, 379, 421, 433, 439, 463, 523, 541, 571, 673, 757, 787, 829, 853, 937, 967, 1117, 1237, 1249, 1321, 1399, 1453, 1489, 1549, 1609, 1741, 1747, 1759, 1783, 1861, 1879, 2011, 2089, 2137, 2161, 2239, 2293
Offset: 1
Keywords
Crossrefs
Cf. A124825.
Programs
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Mathematica
Select[Prime[Range[220]], PrimeQ[10#+7]&&PrimeQ[7#+10]&]
Extensions
Edited by N. J. A. Sloane, Jul 03 2008 at the suggestion of R. J. Mathar
Comments