26681
domain: N
Properties
Primality
- Prime
- yes
Appears in sequences
- Primes p such that p, p+6, p+12, p+18 are all primes.at n=40A023271
- Primes of the form j^2 + (j+1)^2.at n=40A027862
- Numbers p from A001125 such that 2*p-3 is prime.at n=35A063939
- Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <= 6 (i.e., when d = 2, 4 or 6) and forming pattern = [2, 4, 6]; short notation = [246] d-pattern.at n=29A078847
- Primes p such that the differences between the 5 consecutive primes starting with p are (2,4,6,6).at n=5A078947
- Near twin primes of order 18: twin primes (p, p+2) such that p+18 and p+20 are primes.at n=35A079304
- Squares of the norms of Gaussian primes from A107629.at n=39A107630
- Lesser prime in pair prime(k) +/- k for some k.at n=39A107636
- Primes of the form p = prime(k) = (prime(k+3)+prime(k-1))/2.at n=25A126238
- Prime numbers p of the form 10k+1 for which the quintic polynomial x^5-x-1 modulus p is factorizable into five binomials.at n=4A135842
- Prime numbers p for which the quintic polynomial x^5 - x - 1 modulo p completely factors into linear polynomials.at n=19A135844
- Primes p such that the polynomial x^2 + x + p generates only primes for x = 1..6.at n=5A144051
- Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1110-0110-0111 pattern in any orientation.at n=12A147498
- Middle of 3 consecutive prime numbers, p1, p2, p3, such that p1*p2*p3*d1*d2 = average of twin prime pairs; d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=22A153410
- Primes of the form 50n^2 + 10n + 1.at n=12A154428
- Hypotenuse C of primitive Pythagorean triangles such that perimeters are Averages of twin prime pairs, q=p+1, a=q^2-p^2, c=q^2+p^2, b=2*p*q, s=a+b+c, s-+1 are primes.at n=15A155175
- Primes in A155175.at n=8A155185
- Initial members of prime triples (p, p+2, p+6) for which also the sum 3p+8 is prime.at n=32A162001
- Primes p such that (p, p+2, p+6, p+12) is a prime quadruple.at n=37A172454
- Primes such that applying "reverse and add" twice produces two more primes.at n=10A174402