Find prime numbers. Good for giving the CPU some exercise!

primes.py

import random, math

def FindPrimes(lowLimit, highLimit):
	cand = list(range(lowLimit, highLimit))
	for i in range(2,lowLimit):
		current = i * int(math.floor(lowLimit / i))
		while current < highLimit:
			if current in cand:
				cand.remove(current)

			current += i
	return cand

if __name__=="__main__":
	while True:
		l1 = random.randint(1000000,10000000)
		l2 = l1 + 1000
		cand = FindPrimes(l1, l2)
		print (l1, l2, cand)