most efficient method to find first n prime numbers code example

Example: first n prime number finder in python

>>> def getprimes(x):	primes = []	# Loop through 9999 possible prime numbers	for a in range(1, 10000):		# Loop through every number it could divide by		for b in range(2, a):			# Does b divide evenly into a ?			if a % b == 0:				break		# Loop exited without breaking ? (It is prime)		else:			# Add the prime number to our list			primes.append(a)		# We have enough to stop ?		if len(primes) == x:			return primes		>>> getprimes(5)[1, 2, 3, 5, 7]>>> getprimes(7)[1, 2, 3, 5, 7, 11, 13]