Lua 5.3 introduces the integer subtype, which uses 64-bit integer by default.

From Lua 5.3 reference manual

The type number uses two internal representations, one called  integer and the other called float. Lua has explicit rules about when  each representation is used, but it also converts between them  automatically as needed (see §3.4.3). Therefore, the programmer may  choose to mostly ignore the difference between integers and floats or to  assume complete control over the representation of each number.  Standard Lua uses 64-bit integers and double-precision (64-bit) floats, but you can also compile Lua so that it uses 32-bit integers and/or  single-precision (32-bit) floats. The option with 32 bits for both  integers and floats is particularly attractive for small machines and  embedded systems. (See macro LUA_32BITS in file luaconf.h.)

  Lua  5.4 . 2   Copyright (C)  1994  -  2020  Lua.org, PUC - Rio
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  Lua  5.4 . 2   Copyright (C)  1994  -  2020  Lua.org, PUC - Rio
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Lua 5.4.2  Copyright (C) 1994-2020 Lua.org, PUC-Rio
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> 1951785056590630794 / 1 | 0
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