Data commit

Task/Cuban-primes/Python/cuban-primes.py

@@ -0,0 +1,67 @@
+import datetime
+import math
+
+primes = [ 3, 5 ]
+
+cutOff = 200
+
+bigUn =  100_000
+chunks = 50
+little = bigUn / chunks
+
+tn = " cuban prime"
+print ("The first {:,}{}s:".format(cutOff, tn))
+
+c = 0
+showEach = True
+u = 0
+v = 1
+st = datetime.datetime.now()
+
+for i in range(1, int(math.pow(2,20))):
+	found = False
+	u += 6
+	v += u
+	mx = int(math.sqrt(v))
+	
+	for item in primes:
+		if (item > mx):
+			break
+		if (v % item == 0):
+			found = True
+			break
+	
+	if (found == 0):
+		c += 1
+		if (showEach):
+			z = primes[-1]
+			while (z <= v - 2):
+				z += 2
+				
+				fnd = False
+				for item in primes:
+					if (item > mx):
+						break
+					if (z % item == 0):
+						fnd = True
+						break
+				
+				if (not fnd):
+					primes.append(z)
+			
+			primes.append(v)
+			print("{:>11,}".format(v), end='')
+			
+			if (c % 10 == 0):
+				print("");
+			if (c == cutOff):
+				showEach = False
+				print ("Progress to the {:,}th {}:".format(bigUn, tn), end='')
+		if (c % little == 0):
+			print('.', end='')
+		if (c == bigUn):
+			break
+
+print("");
+print ("The {:,}th{} is {:,}".format(c, tn, v))
+print("Computation time was {} seconds".format((datetime.datetime.now() - st).seconds))