Lehman_CustomKOrder (org.matheclipse:matheclipse-gpl 3.0.0 API)

java.lang.Object
- de.tilman_neumann.jml.factor.FactorAlgorithm
- - de.tilman_neumann.jml.factor.lehman.Lehman_CustomKOrder

```
public class Lehman_CustomKOrder
extends FactorAlgorithm
```
A variant of Lehman's algorithm that allows to arrange the k's in arrays of different "performance levels". k-values that perform very well like those divisible by 315 are tested before others that do not perform that well. For large k we also use congruences of a == kN (mod 2^s) instead of Lehman's a == (k+N) (mod 2^s), which seem to be slightly more discriminative.

Field Summary
- Fields inherited from class de.tilman_neumann.jml.factor.FactorAlgorithm
  DEFAULT, NUM_PRIMES_FOR_31_BIT_TDIV, tdivLimit

Constructor Summary

Constructors
Constructor Description

Lehman_CustomKOrder(boolean doTDivFirst)
Full constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`findSingleFactor(long N)`
`BigInteger`	`findSingleFactor(BigInteger N)`	Find a single factor of the given N, which is composite and odd.
`String`	`getName()`
`static void`	`main(String[] args)`	Test.

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Lehman_CustomKOrder
```
public Lehman_CustomKOrder(boolean doTDivFirst)
```
    Full constructor.
    
    Parameters:
    
    doTDivFirst - If true then trial division is done before the Lehman loop. This is recommended if arguments N are known to have factors < cbrt(N) frequently.
- Method Detail
  - getName
```
public String getName()
```
    Specified by:
    
    getName in class FactorAlgorithm
    
    Returns:
    
    The name of the algorithm, possibly including important parameters.
  - findSingleFactor
```
public BigInteger findSingleFactor(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
    
    Returns:
    
    factor
  - findSingleFactor
```
public long findSingleFactor(long N)
```
  - main
```
public static void main(String[] args)
```
    Test.
    
    Parameters:
    
    args - ignored