A177507 Primes of the form 4*10^n+3.

7, 43, 4003, 40000003, 40000000003, 40000000000000000000000000000000000000003

Offset

1,1

Comments

a(9) has 1738 digits. - Vincenzo Librandi, Jan 03 2014

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..8

Makoto Kamada, Prime numbers of the form 400...003.

Mathematica

Select[Table[4 10^n + 3, {n, 0, 300}], PrimeQ] (* Vincenzo Librandi, Jan 03 2014 *)

Prog

(Magma) [a: n in [0..250] | IsPrime(a) where a is 4*10^n+3];

Crossrefs

Cf. A101397.

Sequence in context: A289737 A065786 A015463 * A258182 A048605 A165210

Adjacent sequences: A177504 A177505 A177506 * A177508 A177509 A177510

Keyword

nonn

Author

Vincenzo Librandi, Dec 11 2010

Status

approved