Multiply-with-carry (MWC) generators are fast pseudorandom number generators, but their output quality depends on the choice of a multiplier. According to the paper's abstract, this quality is usually assessed with the spectral test applied to an associated multiplicative structure.
The paper, "Scrambled Multiply-with-Carry Pseudorandom Number Generators," addresses scrambled variants of MWC generators. The preprint's announcement is brief, and the abstract cuts off before describing the construction or results, so the digest can only report the stated context and motivation.
For researchers working on pseudorandom number generation, the announcement highlights a familiar tension: speed remains a key design goal, while statistical quality is still tied to careful multiplier selection and spectral testing.