R298 tested to n=1024.

k = m^2 and m == 5 or 8 mod 13 proven composite by partial algebraic factors.

R303 tested to n=1024.

Add R215 file, since R215 also have k=2 remain at n=1024.

Reserve R211, also an interesting base like R106, since 211-1 = 2*3*5*7, there are many possible divisors (i.e. gcd(k-1,b-1)).

R211 tested to n=1024

k = m^2 and m == 23 or 30 mod 53 proven composite by partial algebraic factors (however, since the CK for this base is only 100, thus no k's proven composite by partial algebraic factors).

Reserve R181, since all Riesel conjectures <=180 with small CK were already tested.

R181 tested to n=1024

k = m^2 and m == 5 or 8 mod 13 proven composite by partial algebraic factors (however, since the CK for this base is only 25, thus no k's proven composite by partial algebraic factors).

Take S211 and S181

S211 and S181 both tested to n=1024, S181 is proven.

Take SR243 and SR729

All tested to n=1024.

k's that proven composite by algebra factors:

R243:

k = m^5
k = m^2 with m = 11 or 50 mod 61

R729:

k = m^2
k = m^3

S243:

k = m^5

S729:

k = m^3