RosettaCodeData/Task/Fractran/Python/fractran-2.py

14 lines
464 B
Python

from fractran import fractran
def fractran_primes():
for i, fr in enumerate(fractran(2), 1):
binstr = bin(fr)[2:]
if binstr.count('1') == 1:
prime = binstr.count('0')
if prime > 1: # Skip 2**0 and 2**1
yield prime, i
if __name__ == '__main__':
for (prime, i), j in zip(fractran_primes(), range(15)):
print("Generated prime %2i from the %6i'th member of the fractran series" % (prime, i))