Composite values of F(2^n)+h for the Fibonacci sequence
Prove or disprove that for any integer h, the numbers F(2^n)+h are composite for infinitely many integers n, where F(n) denotes the Fibonacci sequence.
References
Let (F(n))_{n\ge 1} be the Fibonacci sequence. Let h be an arbitrary integer. Prove or disprove that the numbers F(2n)+h are composite for infinitely many n.
— Intervals without primes near an iterated linear recurrence sequence
(2504.14968 - Saito, 21 Apr 2025) in Problem (following the discussion on reversibility), Introduction