Quantum computers, for example, can do computations that we do not know how to perform using ordinary computers even if we had billions of years of computing time — the famous example being code cracking through the prime factorization of large numbers. (sciencedaily.com)
Improved source apportionment of PAHs and Pb by integrating Pb stable isotopes and positive matrix factorization application (PAHs): A historical record DATING DOULTON BURSLEM. (myintimcity.com)
The Prime Factorization Trees Worksheets are great visual aids. (math-aids.com)