30851

Properties

Appears in sequences

• Near twin primes of order 18: twin primes (p, p+2) such that p+18 and p+20 are primes.at n=38A079304
• Primes p such that 2^p-1 and the p-th Fibonacci number have a common factor. Prime terms of A074776.at n=14A080050
• Primes p such that p+2, p^2 - 2p + 2, and p^2 - 2p + 4 are all prime.at n=15A101315
• 5th diagonal of triangle in A059317.at n=27A106113
• Sophie Germain primes for which the reversal is also a Sophie Germain prime.at n=30A118573
• Primes of the form (p^2+2)/33 (with p prime).at n=14A165673
• Primes p of the form 4*k+3 such that p+2 is prime and p-1 is nonsquarefree.at n=27A175606
• Larger of emirp pairs whose digital sums are also emirps (A178091).at n=37A178093
• Primes of the form 2*n^2 + 74*n + 35.at n=13A217500
• a(n) = 6*n^3 - 263*n^2 + 3469*n - 12841.at n=33A218457
• Primes p such that 16*p^2 + 10*p + 1 divides 2^p - 1.at n=13A231916
• Primes p such that f(f(p)) is prime, where f(x) = x^4 + x^3 + x^2 + x + 1 = A053699(x).at n=31A237445
• Primorial base emirps: prime numbers whose primorial base reversal is a different prime.at n=39A333425
• Primes p such that 2*p+1 and (2*p)^2+(2*p+1)^2 are also prime.at n=33A347110
• Prime numbersat n=3326