1468897

Properties

Appears in sequences

• Numbers k such that sigma((k + 1) / 2) is a prime q.at n=35A292446
• Primes p such that sigma((p + 1) / 2) is a prime q.at n=19A292447
• Odd integers k such that 2^((k-1)/2) == 1 (mod k*(k-2)).at n=24A337846
• Prime numbersat n=111965