A059746 Numbers k such that 3*2^k + 7 is prime.

1, 2, 3, 5, 6, 9, 10, 11, 19, 22, 30, 35, 41, 91, 101, 125, 261, 706, 750, 1315, 1629, 2082, 2979, 3029, 3077, 3950, 4097, 5491, 5746, 10761, 12946, 14770, 15642, 30006, 34157, 34722, 48499, 62862

Offset: 1

Author

Robert G. Wilson v, Feb 10 2001

Keywords

• nonn
• more

Comments

According to PRP Records, this sequence contains 131867, 164205, 185429, 232750, 256149, 295139, 315067, 368489. - Jason Yuen, Sep 02 2024

Links

• Henri Lifchitz and Renaud Lifchitz, PRP Records.

Crossrefs

Cf. A059747.

Programs

Mathematica

Do[ If[ PrimeQ[ 3*2^n + 7 ], Print[n] ], {n, 1, 3000} ]

PARI

is(n)=ispseudoprime(3*2^n+7) \\ Charles R Greathouse IV, Jun 13 2017

Extensions

More terms from Robert G. Wilson v, Jan 28 2003

a(33) from Michael S. Branicky, Jan 09 2023

a(34) from Michael S. Branicky, Jan 12 2023

a(35)-a(37) from Michael S. Branicky, Apr 06 2023

a(38) from Michael S. Branicky, Jul 31 2024