85864769

Properties

Appears in sequences

• Smallest prime beginning a complete Cunningham chain of length n (of the first kind).at n=8A005602
• a(n) = smallest prime p such that the first n iterates of p under x->2x+1 are all primes.at n=8A057331
• Smallest number whose Sophie Germain degree (see A063377) is n.at n=9A063378
• Smallest prime beginning (through <*2+1> or/and <*2-1>) a complete Cunningham chain (of the first or the second kind) of length n.at n=8A110089
• Numbers that remain prime through 7 iterations of function f(x) = 2x + 1.at n=2A138025
• Numbers that remain prime through 8 iterations of function f(x) = 2x + 1.at n=0A138030
• Numbers n such that n remains prime through 6 iterations of function f(x) = 2x + 1.at n=20A278932
• Indices of records in A063377.at n=5A339581
• a(n) is the first prime p such that the longest sequence of primes p = p_1, p_2, ... with |p_{k+1} - 2*p_k| = 1 has length n.at n=8A364091
• Prime numbersat n=4991062