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Task/Fractran/Python/fractran-2.py

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+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))