Help with math.random

[MasonX890]

I’m using the following code to give me a random number:

local id = math.random(1,2000000000)

This number is used to then find the ROBLOX player associated with that number ( or id, i guess you could call it)

My Issue is that (according to google) there are over 6.4 billion ROBLOX accounts, and when I try and do math.random with any number higher than 2 billion I get this error:

 ServerScriptService.Server:10: invalid argument #2 to 'random' (interval is empty) 

If needed here is the full script:

local rep = game:GetService("ReplicatedStorage")
local invoke = rep.RemoteFunction
local rt = require(script.r)

invoke.OnServerInvoke = function(player)
	local Table = {}
	--local picked = game.Players:GetNameFromUserIdAsync(id)
	
	for i = 1, 5 do
		local id = math.random(1,6000000000)
		
		local rid = rt.fr(id)
		table.insert(Table, rid)
	end
	
	return Table
end

How can I fix this? Or is there a better way of doing it?

[GrenadeNade]

Hello Mason.

The error you’re encountering occurs because the math.random function in Lua
only supports generating random numbers within the 32-bit integer range,
which is approximately between -2,147,483,648 & 2,147,483,647.
When you try to use a larger range, like 1 to 6,000,000,000, it exceeds this limit.

The solution to generate a number in a larger range is to combine two math.random calls.

local function random_large_number(min, max)
    local range = max - min
    local first_half = math.random(0, math.floor(range / 2))
    local second_half = math.random(0, math.floor(range / 2))
    local result = min + first_half * (math.floor(range / 2) + 1) + second_half
    return result
end

-- Example usage:
local id = random_large_number(1, 6000000000)

Sincerely,
Bellamy Lakey.

[SyntaxMenace]

Or the Random.new() function could be used.

[GrenadeNade]

Yes, using Random.new() will work for generating large numbers.
Random.new() creates a random object, which provides a more flexible and reliable way to generate random numbers, and it doesn’t suffer from the 32-bit integer limit that math.random has.

local randomGenerator = Random.new()

for i = 1, 5 do
    local id = randomGenerator:NextInteger(1, 6000000000)
    local rid = rt.fr(id)
    table.insert(Table, rid)
end