39761

Properties

Appears in sequences

• Least odd prime divisor of prime(n)*prime(n-1) - 1, or 1 if prime(n)*prime(n-1) - 1 is a power of 2.at n=60A023519
• Denominators of continued fraction convergents to sqrt(242).at n=11A041453
• Number of 6-element families of an n-element set such that every 4 members of the family have a nonempty intersection.at n=5A051366
• Primes equal to a product of twin primes minus 1 divided by 2.at n=7A086870
• (Product of twin primes - 1)/2.at n=18A120876
• Primes in A128490.at n=26A128491
• Primes p such that both (p^2 + 5)/6 and (p^4 + 5)/6 are prime.at n=28A253925
• Primes equal to the sum of both two and three successive semiprimes.at n=29A255897
• Centered 16-gonal (or hexadecagonal) primes.at n=28A264823
• Numbers k such that A155085(k) is in A037074.at n=15A352616
• Primes p such that 5*p+6, 5*p+12, 5*p+18 and 5*p+24 are all primes.at n=20A355577
• Prime numbersat n=4179