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function is_lychrel(n)
m = n
for k =1, 500 do
if n > 10000000 then
return string.format("%s is a Lychrel candidate. Reached the 1e7 limit", m)
end
rev = tonumber(string.reverse(tostring(n)))
if n == rev then return 0 end
n = n + rev
end
return string.format("%s is a lychrel candidate (made 500 iterations)", m);
end
for key, test in ipairs({10, 20, 30, 50, 100, 196}) do
print(test, " -> ", is_lychrel(test))
end
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