6242685

Appears in sequences

• Pseudoprimes (base-2) equal to the product of 5 primes not necessarily distinct.at n=13A112443
• a(n) = floor((2^n)/(3*n - 1)).at n=28A191629
• a(n) = floor((1 + 4^n)/(1 + 3*n)).at n=13A191639
• Fermat pseudoprimes to base 2 divisible by 15.at n=19A216364
• Fermat pseudoprimes to base 2 that are palindromic in base 2.at n=21A346567
• Base-2 Fermat pseudoprimes k such that (k-1)/ord(2, k) > (m-1)/ord(2, m) for all base-2 Fermat pseudoprimes m < k, where ord(2, k) is the multiplicative order of 2 modulo k.at n=27A367319