1092547domain: NAppears in sequencesPseudoprimes to base 2 of the form 4k+3.at n=34A177884Poulet numbers of the form (6k+1)*(24k+1).at n=6A182123Semiprime 2-pseudoprimes of the form 10k + 7.at n=25A216667Pseudoprimes congruent to 7 mod 10.at n=31A317972Fermat pseudoprimes to base 2 that are decagonal.at n=22A321870