local int = require "int"
local fmt = require "fmt"

print("Additive primes less than 500:")
local primes = int.primes(499)
local count = 0
for primes as p  do
    if int.isprime(int.digstat(p)[2]) do
        count += 1
        fmt.write("%3d  ", p)
        if count % 10 == 0 then print() end
    end
end
print($"\n\n{count} additive primes found.")