exiting a while loop

[John Yeadon]

Am I unreasonable in expecting this code to exit when required?


# Add up the powers of 2 starting with 2**0 until 2 million is met.
n = 1
target = 2000000
sum = 0

while True:
     x = 2 ** (n - 1)
     sum += x
     print(n, sum)
     if sum >= target:
         print("Target met.")
         exit
     n += 1

print("\n", n, "terms are required.")