Data commit

Task/Prime-decomposition/Go/prime-decomposition.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+    "fmt"
+    "math/big"
+)
+
+var (
+    ZERO = big.NewInt(0)
+    ONE  = big.NewInt(1)
+)
+
+func Primes(n *big.Int) []*big.Int {
+    res := []*big.Int{}
+    mod, div := new(big.Int), new(big.Int)
+    for i := big.NewInt(2); i.Cmp(n) != 1; {
+        div.DivMod(n, i, mod)
+        for mod.Cmp(ZERO) == 0 {
+            res = append(res, new(big.Int).Set(i))
+            n.Set(div)
+            div.DivMod(n, i, mod)
+        }
+        i.Add(i, ONE)
+    }
+    return res
+}
+
+func main() {
+    vals := []int64{
+        1 << 31,
+        1234567,
+        333333,
+        987653,
+        2 * 3 * 5 * 7 * 11 * 13 * 17,
+    }
+    for _, v := range vals {
+        fmt.Println(v, "->", Primes(big.NewInt(v)))
+    }
+}