207227

Properties

Appears in sequences

• Special safe primes (from A005385) such that the next prime is also a safe prime.at n=24A059394
• Smaller of safe prime twins: special safe primes (A005385) p such that the next prime is also the next safe prime and is p+12, i.e., occurs at the closest possible distance, 12.at n=15A059395
• Class 10- primes.at n=1A081429
• a(1) = 2; k(1) = 0; for n > 1: k(n) = smallest number j >= k(n-1) such that 2*a(n-1) + j is prime; a(n) = 2*a(n-1) + k(n).at n=16A105120
• Primes having only {0, 2, 7} as digits.at n=28A261267
• Prime numbersat n=18565