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A177120 Primes of the form (5*10^n+3). 1
53, 503, 5003, 500000003, 5000000000000000003, 500000000000000000003, 50000000000000000000000000000003, 5000000000000000000000000000000000000000003 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..13

Makoto Kamada, Prime numbers of the form 500...003.

MATHEMATICA

Select[5 10^Range[80] + 3, PrimeQ] (* Vincenzo Librandi, May 11 2013 *)

PROG

(MAGMA)[ a: n in [0..250]|IsPrime(a) where a is 5*10^n+3]

CROSSREFS

Cf. A096254.

Sequence in context: A142209 A322043 A293089 * A165555 A201855 A112749

Adjacent sequences:  A177117 A177118 A177119 * A177121 A177122 A177123

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Dec 10 2010

STATUS

approved

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Last modified January 22 10:25 EST 2020. Contains 331144 sequences. (Running on oeis4.)