13823601domain: NAppears in sequencesPseudoprimes (base-2) equal to the product of 5 primes not necessarily distinct.at n=24A112443Fermat pseudoprimes to base 2 that can be written as p^2*n - p*n + p, where p is also a Fermat pseudoprime to base 2 and n is a positive integer.at n=9A217835