A055784 Primes q of form q = 10p + 9, where p is also prime.

29, 59, 79, 139, 179, 199, 239, 379, 419, 439, 479, 599, 619, 719, 739, 839, 1019, 1039, 1279, 1319, 1399, 1499, 1579, 1979, 1999, 2239, 2339, 2399, 2579, 2699, 2719, 2819, 2939, 3079, 3119, 3319, 3499, 3539, 3739, 4019, 4099, 4219, 4339, 4639, 4679

Offset: 1

Author

Labos Elemer, Jul 13 2000

Keywords

• nonn

Examples

			5419 = 541*10 + 9, 9 is appended to 541.
		

Crossrefs

Cf. A005384, A005385.

Programs

Mathematica

Select[10#+9&/@Prime[Range[100]],PrimeQ] (* Harvey P. Dale, Aug 20 2012 *)