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A177507 Primes of the form 4*10^n+3. 1
7, 43, 4003, 40000003, 40000000003, 40000000000000000000000000000000000000003 (list; graph; refs; listen; history; text; internal format)
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

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Last modified February 25 05:11 EST 2020. Contains 332217 sequences. (Running on oeis4.)