Sequence of primorial primes: Difference between revisions

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@@ Line 2,857: / Line 2,857: @@
 [1, 2, 3, 4, 5, 6, 11, 13, 24, 66, 68, 75, 167, 171, 172, 287, 310, 352, 384, 457]
 </pre>
+=={{header|Swift}}==
+{{libheader|AttaSwift BigInt}}
+<lang swift>import BigInt
+import Foundation
+extension BinaryInteger {
+  @inlinable
+  public var isPrime: Bool {
+    if self == 0 || self == 1 {
+      return false
+    } else if self == 2 {
+      return true
+    }
+    let max = Self(ceil((Double(self).squareRoot())))
+    for i in stride(from: 2, through: max, by: 1) where self % i == 0  {
+      return false
+    }
+    return true
+  }
+}
+let limit = 20
+var primorial = 1
+var count = 1
+var p = 3
+var prod = BigInt(2)
+print(1, terminator: " ")
+while true {
+  defer {
+    p += 2
+  }
+  guard p.isPrime else {
+    continue
+  }
+  prod *= BigInt(p)
+  primorial += 1
+  if (prod + 1).isPrime() || (prod - 1).isPrime() {
+    print(primorial, terminator: " ")
+    count += 1
+    fflush(stdout)
+    if count == limit {
+      break
+    }
+  }
+}</lang>
+{{out}}
+<pre>1 2 3 4 5 6 11 13 24 66 68 75 167 171 172 287 310 352 384 457</pre>
 =={{header|zkl}}==