Data commit

Task/Summarize-primes/Nim/summarize-primes.nim

@@ -0,0 +1,23 @@
+import math, strformat
+
+const N = 999
+
+func isPrime(n: Positive): bool =
+  if (n and 1) == 0: return n == 2
+  if (n mod 3) == 0: return n == 3
+  var d = 5
+  var delta = 2
+  while d <= sqrt(n.toFloat).int:
+    if n mod d == 0: return false
+    inc d, delta
+    delta = 6 - delta
+  result = true
+
+echo "index  prime  prime sum"
+var s = 0
+var idx = 0
+for n in 2..N:
+  if n.isPrime:
+    inc idx
+    s += n
+    if s.isPrime: echo &"{idx:3}   {n:5}   {s:7}"