Someone else offers

EDIT N factor is 13 use last setings
yacminer --scrypt-chacha --worksize 128 -g 1 --lookup-gap 6 --buffer-size 2590 -R 7552
or this
yacminer --scrypt-chacha --worksize 128 -g 2 --lookup-gap 6 --buffer-size 1295 -R 3776
yacminer --scrypt-chacha --worksize 128 -g 1 --lookup-gap 6 --buffer-size 2590 -R 7552