PRP tests now support a type of low overhead error checking that almost guarantees correct results even on flaky hardware.Like LL tests, PRP tests now support shift counts to aid in running double-checks.GIMPS has a new sub-project - finding (probable) prime Mersenne cofactors.This replaces LL testing as the default work type More robust implementation of Gerbicz error checking in PRP tests.Modified torture test dialog box with new options and better understanding of the L1/L2/元 cache hierarchy.