26089808579
domain: N
Appears in sequences
- Smallest prime beginning a complete Cunningham chain of length n (of the first kind).at n=9A005602
- a(n) = smallest prime p such that the first n iterates of p under x->2x+1 are all primes.at n=9A057331
- Smallest number whose Sophie Germain degree (see A063377) is n.at n=10A063378
- 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=9A110089
- Numbers that remain prime through 8 iterations of function f(x) = 2x + 1.at n=11A138030
- Indices of records in A063377.at n=6A339581
- 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=9A364091