Class Hart_TDiv_Race

java.lang.Object
de.tilman_neumann.jml.factor.FactorAlgorithm
de.tilman_neumann.jml.factor.hart.Hart_TDiv_Race

public class Hart_TDiv_Race
extends FactorAlgorithm
A factoring algorithm racing Hart's one line factorizer against trial division. This is the fastest algorithm for test numbers <= 44 bit when their nature is unknown. Hart_Fast is faster for semiprimes that do not have factors < cbrt(N).
  • Field Summary

    Fields inherited from class de.tilman_neumann.jml.factor.FactorAlgorithm

    NUM_PRIMES_FOR_31_BIT_TDIV, tdivLimit
  • Constructor Summary

    Constructors
    Constructor Description
    Hart_TDiv_Race()
    Full constructor.
  • Method Summary

    Modifier and Type Method Description
    long findSingleFactor​(long N)
    Find a factor of long N.
    java.math.BigInteger findSingleFactor​(java.math.BigInteger N)
    Find a single factor of the given N, which is composite and odd.
    java.lang.String getName()  
    static void main​(java.lang.String[] args)
    Test.

    Methods inherited from class de.tilman_neumann.jml.factor.FactorAlgorithm

    factor, factor, getDefault, searchFactors

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

    • Hart_TDiv_Race

      public Hart_TDiv_Race()
      Full constructor.
  • Method Details

    • getName

      public java.lang.String getName()
      Specified by:
      getName in class FactorAlgorithm
      Returns:
      The name of the algorithm, possibly including important parameters.
    • findSingleFactor

      public java.math.BigInteger findSingleFactor​(java.math.BigInteger N)
      Description copied from class: FactorAlgorithm
      Find a single factor of the given N, which is composite and odd.
      Specified by:
      findSingleFactor in class FactorAlgorithm
      Parameters:
      N - number to be factored.
      Returns:
      factor
    • findSingleFactor

      public long findSingleFactor​(long N)
      Find a factor of long N.
      Parameters:
      N -
      Returns:
      factor of N
    • main

      public static void main​(java.lang.String[] args)
      Test.
      Parameters:
      args - ignored