278497

Properties

Appears in sequences

• Primes p such that p*(p-2) divides 2^(p-1)-1.at n=26A081762
• Numbers n such that (n-1)^2-1 divides 2^(n-1)-1.at n=27A260406
• Odd integers k such that 2^((k-1)/2) == 1 (mod k*(k-2)).at n=14A337846
• Prime numbersat n=24316