A363024 Primes of the form 3^(k-1) - 2^k.

11, 179, 601, 1931, 10456158899, 617669101316651, 984770866999239144049, 2153693958571958138940251, 1570042898793851235488822819, 14130386090585813000157964091, 11972515182561981102976512358583456508049, 19088056323407826758511836230558252318494847619

Offset

1,1

Comments

a(23) has 1117 digits. - Michael S. Branicky, May 26 2023

Links

Michael S. Branicky, Table of n, a(n) for n = 1..22

Example

a(1) = 3^3 - 2^4 = 27 - 16 = 11 (prime).
a(2) = 3^5 - 2^6 = 243 - 64 = 179 (prime).

Mathematica

Select[Table[3^(k - 1) - 2^k, {k, 1 , 100}], PrimeQ]

Crossrefs

Prime terms in A003063.

Cf. A162714, A363375, A162715 (subsequence).

Sequence in context: A231916 A101791 A140034 * A162715 A131638 A157382

Adjacent sequences: A363021 A363022 A363023 * A363025 A363026 A363027

Keyword

nonn

Author

Sébastien Tao, May 13 2023

Status

approved