According to Jones paper, the set of prime numbers is identical with te set of positive values taken on by the following polynomial, this page helps finding {a,b,...,z} values that match it.
(1) P = (k+2)(1 - (wz+h+j-q)2 - ((gk+2g+k+1)(h+j)+h-z)2 - (2n+p+q+z-e)2 - (16(k+1)3(k+2)(n+1)2+1-f2)2 - (e3(e+2)(a+1)2+1-o2)2 - (y2(aa-1)+1-x2)2 - (16r2y4(aa-1)+1-u2)2 - (((a+u2(u2-a))2-1)(n+4dy)2+1-(x+cu)2)2 - (n+l+v-y)2 - ((aa-1)l2+1-m2)2 - (ai+k+1-l-i)2 - (p+l(a-n-1)+b(2an+2a-n2-2n-2)-m)2 - (q+y(a-p-1)+s(2ap+2a-p2-2p-2)-x)2 - (z+pl(a-p)+t(2ap-p2-1)-pm)2