4031399

Properties

Appears in sequences

• Wagstaff numbers: numbers k such that (2^k + 1)/3 is prime.at n=40A000978
• Indices of prime Jacobsthal numbers.at n=41A107036
• Numbers n such that (2^n+1)/3 is prime, but cannot be written in the form a^2 + 3*b^2.at n=22A216551
• Numbers k such that (2^k + 1)/(2 - (-1)^k) is a prime.at n=45A280083
• Wagstaff numbers that are of the form 4*k + 3.at n=25A361562
• Prime numbersat n=285228