84629

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 25.at n=16A031613
• Lesser of twin primes (p,q=p+2) such that p*q-p-q and p*q+p+q are primes.at n=10A126334
• Sophie Germain primes that are also highly cototient numbers.at n=19A209194
• Primes p such that p+2, p*(p+1)/2-2 and p*(p+1)/2+2 are also primes.at n=24A349336
• Prime numbersat n=8246