A054256 Concatenation of n in base 2 up to base 10 is prime, all numbers are interpreted as decimals.

7, 33, 169, 197, 209, 351, 401, 419, 459, 541, 553, 599, 883, 971, 981, 1081, 1107, 1201, 1351, 1363, 2011, 2321, 2347, 2563, 2607, 2679, 2703, 2861, 2869, 2909, 2959, 3033, 3067, 3177, 3333, 3403, 3437, 3461, 3471, 3513, 3601, 3647, 3769, 3821, 3833

Offset: 0

Author

Patrick De Geest, Feb 15 2000

Keywords

• nonn
• base

Examples

			a(1)=7 -> 111{2}=21{3}=13{4}=12{5}=11{6}=10{7}=7{8}=7{9}=7{10} -> 1112113121110777 is a prime.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A054257, A054258.

Programs

Mathematica

Select[Range[4000],PrimeQ[FromDigits[Flatten[Table[IntegerDigits[#,n],{n,2,10}]]]]&] (* Harvey P. Dale, Aug 20 2017 *)