A109069 - OEIS

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A109069

Numbers n such that the string n2323 is prime.

1, 3, 4, 6, 12, 19, 22, 25, 43, 48, 52, 54, 57, 63, 66, 67, 70, 73, 82, 84, 85, 87, 111, 132, 139, 145, 150, 151, 157, 159, 160, 172, 175, 187, 195, 201, 204, 210, 211, 213, 216, 217, 223, 228, 235, 238, 241, 256, 258 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Robert Israel, Table of n, a(n) for n = 1..10000`
	EXAMPLE	`n=1 is in the sequence because n2323 = 12323 is prime.` `n=87 is in the sequence because n2323 = 872323 is prime.`
	MAPLE	`select(t -> isprime(10^4*t+2323), [$1..1000]); # Robert Israel, Mar 05 2020`
	CROSSREFS	`Sequence in context: A024373 A111159 A210523 * A329953 A329671 A124571` `Adjacent sequences: A109066 A109067 A109068 * A109070 A109071 A109072`
	KEYWORD	`nonn,base`
	AUTHOR	`Parthasarathy Nambi, Aug 17 2005`
	STATUS	`approved`

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Last modified January 16 21:00 EST 2021. Contains 340213 sequences. (Running on oeis4.)