25693

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 11.at n=27A031599
• Smallest prime p such that M(n)^2-p*M(n)-1 is prime with M(n)= Mersenne primes =A000668(n).at n=14A139428
• Prime p1 of consecutive primes p1, p2, where p2-p1=10, and p1, p2 are in different centuries.at n=27A160500
• Primes of form 5+38*n^2.at n=19A173554
• Primes p such that 2*p^3-+15 are also prime.at n=31A174364
• Expansion of Product_{k>=1} 1/(1 - (5*k-4)*x^(5*k-4)).at n=34A265834
• First of three consecutive primes p,q,r such that r*(p+q) + p*q and r*(p+q) - p*q are prime.at n=41A358382
• a(n) is the smallest k such that k!'s prime(n)-smooth part is less than its prime(n+1)-rough part.at n=36A360316
• Numbers k such that (prime(j)-1)^2 + 1 is prime for k <= j <= k + 2.at n=19A376522
• Prime numbersat n=2830