t=21: #monomials=253, #conditions=396, rank mod p=253, dim I(3Z)_t (mod p)=0
t=22: #monomials=276, #conditions=396, rank mod p=276, dim I(3Z)_t (mod p)=0
t=23: #monomials=300, #conditions=396, rank mod p=300, dim I(3Z)_t (mod p)=0
t=24: #monomials=325, #conditions=396, rank mod p=324, dim I(3Z)_t (mod p)=1
t=25: #monomials=351, #conditions=396, rank mod p=348, dim I(3Z)_t (mod p)=3
product of the 8 cubics (degree 24) satisfies all 396 conditions of 3Z: True
