Data commit

Task/Goldbachs-comet/Python/goldbachs-comet.py

@@ -0,0 +1,25 @@
+from matplotlib.pyplot import scatter, show
+from sympy import isprime
+
+def g(n):
+    assert n > 2 and n % 2 == 0, 'n in goldbach function g(n) must be even'
+    count = 0
+    for i in range(1, n//2 + 1):
+        if isprime(i) and isprime(n - i):
+            count += 1
+    return count
+
+print('The first 100 G numbers are:')
+
+col = 1
+for n in range(4, 204, 2):
+    print(str(g(n)).ljust(4), end = '\n' if (col % 10 == 0) else '')
+    col += 1
+
+print('\nThe value of G(1000000) is', g(1_000_000))
+
+x = range(4, 4002, 2)
+y = [g(i) for i in x]
+colors = [["red", "blue", "green"][(i // 2) % 3] for i in x]
+scatter([i // 2 for i in x], y, marker='.', color = colors)
+show()