Abstract :
It has been proven by F. Leong and the author (1997, J. Algebra190, 474–486) that all Moufang loops of order pαqα11 ••• qαnn are associative if p and qi are odd primes with p < q1 < ••• < qn, and• (i) α ≤ 3, α ≤ 2; or• (ii) ≥ 5, α ≤ 4, α ≤ 2.In this paper, we prove the existence of nonassociative Moufang loops of order pq3 for every pair of odd primes, p and q with q ≡ 1 (mod p).