40127

Properties

Appears in sequences

• a(n) is smallest safe prime (A005385) such that a(n) + 12*n is the next safe prime, i.e., x = (a(n) - 1)/2 and x + 6*n are closest Sophie Germain primes.at n=30A059327
• Class 7- primes.at n=23A081426
• Primes p such that p and p+2 are twin primes and also the strings 987654321p and 987654321p+2 are twin primes.at n=14A103818
• Initial members of prime quadruples (n, n+2, n+24, n+26).at n=32A245568
• Least integer k > 0 such that prime(k) - k*n is a square.at n=11A247893
• Inert rational primes in the intersection of all Q(sqrt(-d)) where d is a Heegner number.at n=8A309024
• Primes p such that p+2, (p+1)||p and (p+1)||(p+2) are primes (where || denotes concatenation in base 10).at n=36A309934
• Lesser of twin primes p such that p and p+2 are both in A115591.at n=37A367318
• Prime numbersat n=4215