47057

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 91.at n=33A020430
• Primes of the form p*q+4 where p and q are consecutive primes.at n=4A063442
• Number of planar graphs with n nodes and chromatic number 3.at n=6A164100
• Prime factors of Giuga numbers A007850 with 8 or fewer prime divisors.at n=19A216823
• Largest prime factor of the n-th Giuga number A007850(n).at n=4A216824
• Twin primes p, p+2 such that p+1 is a primary pseudoperfect number.at n=4A235139
• Table whose n-th row lists the prime factors of the n-th Giuga number A007850(n).at n=21A236434
• Primes of form n^2 + 28561.at n=19A256841
• Numbers k such that A003415(sigma(k)) = k, where A003415 is the arithmetic derivative, and sigma is the sum of divisors of n.at n=3A342021
• Lesser twin primes p such that 4*p is the sum of two consecutive primes.at n=37A350736
• Primes having only {0, 4, 5, 7} as digits.at n=35A386070
• Prime numbersat n=4855