A366680 Numbers k such that (34^k + 1)/35 is prime.

3, 294277, 735439

Offset: 1

Author

Paul Bourdelais, Oct 16 2023

Keywords

• nonn
• bref
• hard
• more

Comments

These are the repunits in base -34.

Examples

			3 is a term since (34^3 + 1)/35 = 1123 is a prime.
		

Links

• Paul Bourdelais, A Generalized Repunit Conjecture

Crossrefs

Cf. A185230.

Programs

Mathematica

Do[ If[ PrimeQ[ (34^n+1)/35], Print[n]], {n, 0, 18000}]

PARI

is(n) = my(q=(34^n+1)/35); (denominator(q)==1) && ispseudoprime(q);