The document is here in the FSharp.Core Version Numbers section.
FSharp.Core 4.4.0.0 corresponds to F # 4.0, running on .NET 4.5 +.
Nuget , - F #. nuget F #, FSharp.Core . . FSHarp.Core Nuget 4.1.12 - Nuget F # 4.1 FSharp.Core 4.4.1.0 FSharp.Core 3.N.4.1.