A100275 Numbers k such that 9*10^k - 11 is prime.

1, 4, 16, 22, 316, 393, 461, 864, 1306, 2964, 8956, 10449, 11652, 13588, 23070, 48421

Offset: 1

Author

R. K. Guy, Dec 29 2004

Keywords

• nonn
• more

Comments

Numbers corresponding to terms <= 864 are certified primes. - Klaus Brockhaus, Feb 15 2005

Crossrefs

Cf. A092767.

Programs

PARI

is(n)=ispseudoprime(9*10^n-11) \\ Charles R Greathouse IV, May 22 2017

Extensions

More terms from Patrick De Geest, Dec 29 2004

a(1) = 1 inserted by Tom Mueller, Feb 08 2005

Edited by R. J. Mathar, Aug 06 2008

a(14)-a(15) from Michael S. Branicky, May 01 2023

a(16) from Michael S. Branicky, Sep 11 2024