607319

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 2x + 1.at n=23A023302
• 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=16A059764
• Primes of the form 4*k-1 such that 8*k-1, 16*k-1, 32*k-1 and 64*k-1 are also primes.at n=8A101995
• Primes p such that 2p+1, 4p+3, 6p+5, 8p+7 are all primes.at n=20A107021
• The set S of primes q satisfying certain conditions (see Müller, 2010 for precise definition).at n=25A275739
• Prime numbersat n=49657