Top
Back: prime
Forward: print
FastBack: Functions and system variables
FastForward: Control structures
Up: Functions
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document

5.1.108 primefactors

Syntax:
primefactors ( int/bigint/number_expression )
primefactors ( int/bigint/number_expression , int_expression )
Type:
list
Purpose:
returns the prime factorisation up to an optionally given bound, b, on the prime factors
When called with int(s)/bigint(s), no ring needs to be active.
When called with numbers these are assumed to be integers in a polynomial ring over Q.
The method finds all prime factors of an integer n. n' will contain the sign, be zero, or the rest (when a bound is given) respectively. The returned list contains the following information: The returned list contains the following information:
L[1][i] = i-th prime factor (in ascending order),
L[2][i] = multiplicity of L[1][i],
L[3] = n'
Example:
 
See prime.

Top Back: prime Forward: print FastBack: Functions and system variables FastForward: Control structures Up: Functions Top: Singular Manual Contents: Table of Contents Index: Index About: About this document
            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.