539009

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 2x + 1.at n=21A023302
• Initial (unsafe) primes of Cunningham chains of first type with length exactly 5. Primes in A059453 that survive as primes just four "2p+1 iterations", forming chains of exactly 5 terms.at n=14A059764
• Primes p such that 128p+1 and (p-1)/128 are both prime.at n=7A086477
• Prime numbersat n=44503