A062335 Primes starting and ending with 9.

919, 929, 9029, 9049, 9059, 9109, 9199, 9209, 9239, 9319, 9349, 9419, 9439, 9479, 9539, 9619, 9629, 9649, 9679, 9689, 9719, 9739, 9749, 9769, 9829, 9839, 9859, 9929, 9949, 90019, 90059, 90089, 90149, 90199, 90239, 90289, 90359, 90379, 90439

Offset

0,1

Links

Harry J. Smith, Table of n, a(n) for n = 0..1000

Example

9679 is a member, as it is a prime and the first and the last digits are both 9.

Mathematica

fl9Q[n_]:=IntegerDigits[n][[1]]==IntegerDigits[n][[-1]]==9; Select[ Prime[ Range[10000]], fl9Q] (* Harvey P. Dale, Dec 31 2019 *)

Prog

(PARI) { default(primelimit, 10^6); n=-1; t=log(10); forprime (p=2, 10^6, if ((p-10*(p\10)) == 9 && (p\10^(log(p)\t)) == 9, write("b062335.txt", n++, " ", p); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 05 2009

Crossrefs

Cf. A062332, A062333, A062334.

Sequence in context: A217226 A217344 A221113 * A179673 A082518 A128375

Adjacent sequences: A062332 A062333 A062334 * A062336 A062337 A062338

Keyword

nonn,base,easy

Author

Amarnath Murthy, Jun 21 2001

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Jun 29 2001

Status

approved