459007

Properties

Appears in sequences

• Primes of form (p^x - 1)/(p^y - 1), p prime.at n=31A003424
• Prime numbers that are the sum of the divisors of some n.at n=24A023195
• Primes of the form p^2 + p + 1 when p is prime.at n=14A053183
• Terms of A000203 that are prime.at n=26A062700
• Primes that can be written as 1+p+p^k, p prime and k > 1.at n=32A084444
• Primes of the form 1+(1+p)*p^e, p prime and e>0.at n=29A087196
• Primes of the form (2k)^2 + 3(2k + 1)^2.at n=34A147297
• Nonlinear recurrence: a(n) = a(n-1) + (a(n-1)+1)*Product_{j=1..n-2} a(j).at n=5A213437
• Primes p of the form sigma(2k-1) for a number k.at n=19A247837
• Primes p such that there is prime q with sigma(q+2) = p.at n=11A247955
• Primes q appearing in A330832: that is, if A330832(n)=p*q, where p is prime and q=(p^k-1)/(p-1) is prime, then a(n)=q.at n=31A330835
• Primes of the form (p^k)^2 + p^k + 1 with prime p and positive integer k.at n=17A342691
• Prime numbersat n=38391