30139

Properties

Appears in sequences

• Smallest odd prime not occurring in the numerator of any of the 2^n subset sums generated from the set 1/1, 1/2, 1/3, ..., 1/n.at n=21A075227
• Primes of the form m*(m+1)/2 + 4.at n=37A159048
• Numbers k such that 2^(k-1) == 1 + b*k (mod k^2), where b divides k - 2^p for some integer p >= 0 and 2^p <= b.at n=38A186884
• Emirps whose internal digits are also an emirp.at n=26A225235
• Integers n such that p = 4n + 1, q = 4p + 3, r = 4q + 5, s = 4r + 7 and t = 4s + 9 are all prime.at n=5A243528
• Greater of twin primes of (40n-23,40n-21).at n=37A244505
• Primes of the form abs(-66n^3 + 3845n^2 - 60897n + 251831) in order of increasing nonnegative n.at n=19A272438
• Prime numbersat n=3261