30881

Properties

Appears in sequences

• Reflectable emirps.at n=24A007628
• Third term of weak prime sextet: p(m-1)-p(m-2) < p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2).at n=10A054830
• Numerator of Sum_{k=1..n} d(k)/k, where d() = A000005().at n=11A060436
• Primes p such that p*(p-1) divides 3^(p-1)-1.at n=29A081763
• Numbers p such that p = (prime(n)+ prime(n+3))/2 is prime for prime indices n=2, 3, 5...at n=28A098039
• Primes p1 such that p1^2+p2^3=pp are average of twin primes. p1 and p2 consecutive primes, p1 < p2.at n=31A138715
• Primes of the form (5+ a triangular number A000217).at n=27A159049
• Smallest primes p = p(k) with (p(k)+p(k+1)+p(k+2))/15 an integer.at n=29A168556
• Primes p such that 2*p^4+-9 are also prime.at n=19A174365
• Primes that are the sum of 51 consecutive primes.at n=22A215992
• Primes of form n^2 + 256.at n=31A256776
• Primes such that x^16 = 2 has a solution in Z/pZ, but x^32 = 2 does not.at n=13A373468
• Prime numbersat n=3331