831599

Properties

Appears in sequences

• Primes generated from a gamma function based formula: very large primes from factorial level numbers like the Euclid n!+1 type of prime.at n=4A117844
• a(n) is the smallest prime such that exactly n prime pairs (p,q) exist with a(n) = p * q + p + q.at n=23A198277
• Numbers k where records occur for d(k+1)/d(k), where d(k) is A000005(k).at n=29A282531
• Primes p for which sigma(p+1)/sigma(p) reaches a record value, where sigma(k) is the divisor sum function (A000203).at n=23A326393
• Numbers k where records occur for sigma(k+1)/sigma(k), where sigma(k) is the sum of divisors of k (A000203).at n=18A335067
• Numbers k achieving record deficiency via a residue-based measure, M(k) = (k+1)*(1 - zeta(2)/2) - 1 - ( Sum_{j=1..k} k mod j )/k.at n=23A362082
• Prime numbersat n=66280