solveSystem(...,computingPrecision=>ZZ)
Use computingPrecision=>2 for double double precision.
Use computingPrecision=>4 for quad double precision.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/PHCpack/PHCpackDoc.m2:1108:0.