27109

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 81.at n=30A020420
• Primes that are palindromic in base 12.at n=40A029979
• Primes of the form 2*k*prime(k) + 1.at n=18A062403
• Primes arising in A085042: a(n) = the n-th partial sum of A085042.at n=37A085043
• Upper twin primes of upper twin prime index.at n=22A088463
• Numbers n such that 9*10^n + 3*R_n + 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=26A103096
• Largest of six consecutive primes the sum of the digits of each of which is prime.at n=18A106720
• Primes p such that p+1, p+2 and p+3 have equal number of divisors.at n=30A119711
• Partial sums of A138202.at n=29A164940
• Least prime of the form x^2+13*n^2.at n=44A248409
• Primes p such that 2*p+1 is divisible by the sum of digits of p+1.at n=43A267542
• Primes p such that A001175(p) = (p-1)/6.at n=32A308791
• Primes p such that A001177(p) = (p-1)/6.at n=37A308799
• Record values in A343717.at n=26A343718
• Prime numbersat n=2974