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diff --git a/lib/pure/mersenne.nim b/lib/pure/mersenne.nim
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-#
-#
-#            Nim's Runtime Library
-#        (c) Copyright 2015 Nim Contributors
-#    See the file "copying.txt", included in this
-#    distribution, for details about the copyright.
-## The [Mersenne Twister](https://en.wikipedia.org/wiki/Mersenne_Twister)
-## random number generator.
-## .. note:: The procs in this module work at compile-time.
-
-{.deprecated: "use `std/random` instead".}
-
-runnableExamples:
-  var rand = newMersenneTwister(uint32.high)  ## must be "var"
-  doAssert rand.getNum() != rand.getNum()  ## pseudorandom number
-## See also
-## ========
-## * `random module<random.html>`_ for Nim's standard random number generator
-type
-  MersenneTwister* = object
-    ## The Mersenne Twister.
-    mt: array[0..623, uint32]
-    index: int
-
-proc newMersenneTwister*(seed: uint32): MersenneTwister =
-  ## Creates a new `MersenneTwister` with seed `seed`.
-  result.index = 0
-  result.mt[0] = seed
-  for i in 1'u32 .. 623'u32:
-    result.mt[i] = (0x6c078965'u32 * (result.mt[i-1] xor
-                                      (result.mt[i-1] shr 30'u32)) + i)
-
-proc generateNumbers(m: var MersenneTwister) =
-
-  for i in 0..623:
-    var y = (m.mt[i] and 0x80000000'u32) +
-            (m.mt[(i+1) mod 624] and 0x7fffffff'u32)
-    m.mt[i] = m.mt[(i+397) mod 624] xor uint32(y shr 1'u32)
-    if (y mod 2'u32) != 0:
-      m.mt[i] = m.mt[i] xor 0x9908b0df'u32
-
-proc getNum*(m: var MersenneTwister): uint32 =
-  ## Returns the next pseudorandom `uint32`.
-  if m.index == 0:
-    generateNumbers(m)
-  result = m.mt[m.index]
-  m.index = (m.index + 1) mod m.mt.len
-  result = result xor (result shr 11'u32)
-  result = result xor ((result shl 7'u32) and 0x9d2c5680'u32)
-  result = result xor ((result shl 15'u32) and 0xefc60000'u32)
-  result = result xor (result shr 18'u32)