Lua 5.4.3  Copyright (C) 1994-2021 Lua.org, PUC-Rio
> primes = {}
> for i = 1, 99999 do primes[i] = i end
> for i = 2, 317 do if primes[i] ~= primes[i-1] then
>> for j = 2*i, 99999, i do
>> local k = primes[j-1]
>> local l = j+1
>> while primes[l] == primes[j] do
>> primes[l] = k
>> l = l+1
>> end
>> primes[j] = k
>> end
>> end end
> =primes[4]
3
> =primes[6]
5
> return primes[10]
7
> primes[12349]
12347
> primes[56089
>> ]
>>
>> end
stdin:4: syntax error near 'end'
> =primes[56089]
56087
> return primes[56809]
56809
> primes[65839]
65839
>