Sierpinski:

2 78557 cover: {3, 5, 7, 13, 19, 37, 73} period=36
3 ?
4 419 cover: {3, 5, 7, 13} period=6
5 7 cover: {2, 3} period=2
6 ?
7 209 cover: {2, 3, 5, 13, 43} period=12
8 1 full algebra period=1
9 31 cover: {2, 5} period=2
10 ?
11 5 cover: {2, 3} period=2
12 521 cover: {5, 13, 29} period=4

Riesel: 

2 509203 cover: {3, 5, 7, 13, 17, 241} period=24
3 12119 cover: {2, 5, 7, 13, 73} period=12
4 9 full algebra period=1
5 13 cover: {2, 3} period=2
6 84686 cover: {7, 13, 31, 37, 97} period=12
7 457 cover: {2, 3, 5, 13, 19} period=12
8 14 cover: {3, 5, 13} period=4
9 1 full algebra period=1
10 334 {3, 7, 13, 37} period=8
11 5 cover: {2, 3} period=2
12 25 partial algebra, cover: {13} period=2