18839

Properties

Appears in sequences

• Discriminants of quintic fields with 2 complex conjugates (negated).at n=32A023684
• Lower prime of a difference of 20 between consecutive primes.at n=38A031938
• Primes setting records for earliest alphabetical position in American English.at n=15A050444
• Start of a run of consecutive primes of length n each ending with the same digit.at n=3A054681
• Smallest prime followed by three gaps that are multiples of 2n.at n=4A054701
• Initial prime in first sequence of n primes congruent to 4 modulo 5. The first prime in a sequence of length n all ending with the digit 9.at n=3A057636
• a(n) is smallest prime > 5*a(n-1), a(1) = 5.at n=5A065541
• Duplicate of A054681.at n=3A084560
• Balanced primes of order seven.at n=18A096699
• a(1) = 1; a(n) = nextprime(2.5*a(n-1)) for n > 1.at n=10A110954
• Numerator of (n+2)^(n+2)/(n+1)^(n+1) - (n+1)^(n+1)/n^n.at n=3A111130
• Prime differences of Lucas 4-step numbers.at n=13A113295
• Smallest prime p=prime(k) such that there exist numbers i and j with prime(k-1) < i < p < j < prime(k+1) and gcd(i,j)=n.at n=42A117392
• Second-order Lucas numbers; a(n) = (2n+3)*Lucas(n) - n*Lucas(n-1).at n=14A134410
• Prime numbers, isolated from neighboring primes by >14.at n=32A137874
• Prime numbers, isolated from neighboring primes by >16.at n=18A137875
• Primes congruent to 24 mod 53.at n=34A142554
• Primes congruent to 51 mod 61.at n=36A142849
• Number of primes among first 10^n primes that have first and last digits both equal 3 (not counting the prime 3).at n=5A145710
• Primes with a prime number of partitions into prime parts.at n=25A146949