Module:Utils: Difference between revisions
1 is not a prime |
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-- cached list of primes for is_prime | -- cached list of primes for is_prime | ||
local primes = {[1] = false} | local primes = { | ||
[0] = false, | |||
[1] = false | |||
} | |||
-- returns true if integer n is prime; cannot be used with {{#invoke:}} | -- returns true if integer n is prime; cannot be used with {{#invoke:}} | ||
| Line 120: | Line 123: | ||
function p._prime_factorization(n) | function p._prime_factorization(n) | ||
if n | if n <= 1 then | ||
return | return tostring(n) | ||
end | end | ||
local factors, powers = {}, {} | local factors, powers = {}, {} | ||