13 Bombieri-Vinogradov
A formalization of Bombieri-Vinogradov (modulo Siegel-Walfisz) is under way at https://github.com/FLDutchmann/lean-bombieri-vinogradov
A formalization of Bombieri-Vinogradov (modulo Siegel-Walfisz) is under way at https://github.com/FLDutchmann/lean-bombieri-vinogradov