52919

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 3x + 2.at n=34A023277
• Numbers n such that ((1+I)^n+1)/(2+I) is a Gaussian prime.at n=28A124112
• Primes p such that (2^p + 2^((p+1)/2) + 1)/5 is prime.at n=11A124165
• Numerator of Bernoulli(n,7).at n=4A157946
• Numbers m such that m mod k is k-1 for all k = 2..9.at n=20A166931
• Primes p of the form penta(n)-3, where penta(n) is the n-th pentagonal number.at n=40A232537
• Numbers k such that 15*10^k + 1 is prime.at n=17A295325
• a(n) is the least prime p such that there are exactly n pairs of primes (q,r) with p > q > r such that q | r + p and r | q + p.at n=14A344776
• 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=17A362082
• Primes that are the concatenation of a square and a prime that is the concatenation of two squares.at n=31A364359
• a(n) is the least integer k requiring any combination of at least n 1's or 2's to build using + and *.at n=22A382685
• Prime numbersat n=5400