A258932 Numbers n such that 10^n + 103 is prime.

1, 3, 4, 5, 7, 9, 10, 11, 27, 35, 85, 169, 209, 221, 321, 347, 603, 610, 1229, 1391, 2171, 2303, 2679, 3977, 4545, 5721, 7090, 35877

Offset

1,2

Links

Table of n, a(n) for n=1..28.

Example

For n = 3, a(3) = 10^3 + 103 = 1103, which is prime.

Mathematica

Select[Range[5000], PrimeQ[10^# + 103] &]

Prog

(Magma) [n: n in [1..600] | IsPrime(10^n+103)];
(PARI) is(n)=ispseudoprime(10^n+103) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequences of the type 10^n+k: A049054 (k=3), A088274 (k=7), A088275 (k=9), A095688 (k=13), A108052 (k=19), A108050 (k=21), A108312 (k=27), A107083 (k=31), A107084 (k=33), A135109 (k=37), A135108 (k=39), A108049 (k=43), A108054 (k=49), A135118 (k=51), A135119 (k=57), A135116 (k=61), A135115 (k=63), A135113 (k=67), A135114 (k=69), A135132 (k=73), A135131 (k=79), A137848 (k=81), A135117 (k=87), A110918 (k=91), A135112 (k=93), A135107 (k=97), A110980 (k=99), this sequence (k=103), A258933 (k=109), A165508 (k=111), A248349 (k=123456789), A248351 (k=987654321).

Sequence in context: A153329 A213637 A047251 * A183213 A183172 A136495

Adjacent sequences: A258929 A258930 A258931 * A258933 A258934 A258935

Keyword

nonn,more

Author

Vincenzo Librandi, Jun 15 2015

Extensions

a(26)-a(28) from Jens Kruse Andersen, Jun 23 2015

Status

approved