417202699domain: NPropertiesPrimalityPrimeyesAppears in sequencesLeast prime p such that B_{2*n} == 0 (mod p) but there is no k < n with B_{2k} == 0 (mod p), or 1 if such a prime p does not exist, where B_m denotes the m-th Bernoulli number.at n=24A242193Smallest prime factor of |A001067(n)|, or 1 if |A001067(n)| = 1.at n=24A281331Prime numbersat n=22203899