86143

Properties

Appears in sequences

• Primes of form (p^x - 1)/(p^y - 1), p prime.at n=25A003424
• Prime numbers that are the sum of the divisors of some n.at n=19A023195
• Primes of the form p^2 + p + 1 when p is prime.at n=12A053183
• Terms of A000203 that are prime.at n=22A062700
• Primes of the form 4*k^2 - 10*k + 7 with k positive.at n=39A073337
• Primes that can be written as 1+p+p^k, p prime and k > 1.at n=27A084444
• Primes of the form 1+(1+p)*p^e, p prime and e>0.at n=24A087196
• Primes of the form (2k)^2 + 3(2k + 1)^2.at n=19A147297
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.at n=11A148356
• Primes p such that there are positive integers m and n and a prime q such that p = m^2+m-q = n^2+n+q.at n=38A162652
• Primes of the form ((p-1)/2)^2+((p+1)/2), where p is prime.at n=39A163418
• Primes of the form 2*n^2 + 82*n + 39.at n=20A217620
• Primes p of the form sigma(2k-1) for a number k.at n=15A247837
• Primes p such that there is prime q with sigma(q+2) = p.at n=10A247955
• Primes q of the form sigma((p + 1) / 2) where p is a prime.at n=11A292448
• Odd primes p with the property that gcd(ord_p q: prime q divides p-1) = 1.at n=31A295975
• 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=26A330835
• Primes of the form (p^k)^2 + p^k + 1 with prime p and positive integer k.at n=14A342691
• Prime numbersat n=8375