A108757 Numbers n such that 1000n + 911 is prime.

0, 3, 6, 12, 17, 18, 21, 23, 30, 32, 33, 35, 41, 47, 56, 69, 72, 80, 83, 87, 90, 93, 95, 96, 98, 102, 104, 116, 117, 123, 132, 135, 137, 149, 153, 159, 161, 164, 167, 188, 191, 194, 201, 203, 206, 210, 216, 219, 224, 228, 233, 237, 242, 243, 245, 249, 252, 254

Offset

1,2

Links

Table of n, a(n) for n=1..58.

Example

0 is in the sequence because 1000*0+911 = 911 is prime.
32 is in the sequence because 1000*32+911 = 32911 is prime.

Maple

c:=proc(x, y) local s: s:=proc(m) nops(convert(m, base, 10)) end: x*10^s(y)+y: end: a:=proc(n) if isprime(c(n, 911))=true then n else fi end: seq(a(n), n=0..360); # c is the process which concatenates two positive integers # Emeric Deutsch, Aug 07 2005

Prog

(Magma) [ n: n in [0..300] | IsPrime(1000*n+911) ];
(PARI) is(n)=isprime(1000*n+911) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A109735 A086538 A127563 * A323645 A307042 A146952

Adjacent sequences: A108754 A108755 A108756 * A108758 A108759 A108760

Keyword

nonn,easy

Author

Parthasarathy Nambi, Jul 25 2005

Extensions

More terms from Emeric Deutsch, Aug 07 2005

Status

approved