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A109071 Numbers n such that the string n123123 is prime. 2
2, 8, 19, 31, 37, 64, 68, 71, 79, 85, 89, 94, 100, 109, 128, 136, 137, 148, 149, 157, 170, 178, 179, 181, 184, 190, 194, 211, 215, 233, 241, 250, 251, 269, 277, 284, 290, 293, 298, 304, 310, 313, 314, 316, 317, 326, 331, 353, 355, 367, 370, 376, 386, 394, 400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Also numbers n such that 10^6*n+123123 is prime. - Stefan Steinerberger, Mar 03 2006

LINKS

Table of n, a(n) for n=1..55.

EXAMPLE

If n=2 then n123123 = 2123123 (prime).

If n=94 then n123123 = 94123123 (prime).

MATHEMATICA

Select[Range[0, 500], PrimeQ[10^6*# + 123123] &] (* Stefan Steinerberger, Mar 03 2006 *)

CROSSREFS

Sequence in context: A049525 A286263 A236327 * A196134 A256321 A192136

Adjacent sequences:  A109068 A109069 A109070 * A109072 A109073 A109074

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Aug 17 2005

EXTENSIONS

More terms from Stefan Steinerberger, Mar 03 2006

STATUS

approved

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Last modified December 5 17:42 EST 2019. Contains 329768 sequences. (Running on oeis4.)