Only the current version so far — new entries appear as the app ships updates.
Touch Integers ℤ (+ - × ÷) is an education app by nummolt with 1,000+ downloads (about 2.6K estimated). +5 installs in the last 7 days. Released Nov 4, 2015. Install growth, rank history, SDKs and ad networks.
From the store listing: “Integers operation using prime numbers: Fundamental Theorem of Arithmetic, live”