186481

Properties

Appears in sequences

• Primes formed by the concatenation 1, n, n^2, n, 1.at n=3A068676
• Primes p such that (r-p)/log(p) > 5, where r is the next prime after p.at n=25A082890
• a(n) = prime(prime(A096480(n))).at n=34A096482
• Sums of the form (twin primes + 1) which are also an upper twin prime.at n=28A158870
• Primes p followed by a gap of 70 = nextprime(p) - p.at n=2A204792
• Primes of the form 2520k + 1 for some k.at n=28A217588
• Primes p such that the maximal length of a Buchi sequence in Z/pZ is less than the value of A124882 for that prime.at n=19A261404
• a(n) is the first prime p such that each of the first n primes divides at least one of the composites between p and the next prime, but prime(n+1) does not divide any of these.at n=29A341640
• Numbers k such that d(k) < d(k+1) < d(k+2) < d(k+3) < d(k+4), where d(n) is the number of divisors of n.at n=31A364717
• a(n) is the least prime p such that there are exactly n squarefree numbers strictly between p and the next prime, or -1 if there is no such p.at n=42A378111
• Prime-indexed primes that are the average of the preceding and following prime-indexed primes.at n=14A391116
• Prime numbersat n=16879