Re: [PrimeNumbers] Another easy PARI question
> Sorry 'bout this but I just can't find some obvious things in the PARIThe factor(N) function returns a matrix with W rows, where W is the number
> manual, I hope I didn't miss it...
> Anyway: the easy instruction "factor(N)" yeilds a matrix. What function
> will tell me just the length and width of the matrix? The length should
> always be 2 but the width will be the number of different factors.
of distinct prime factors of N and each row consists of two elements --
the prime and its exponent in factorization of N. W itself can be found
using the function omega(N).
However, if you have already computed the factorization of N, it might be
much faster to use matsize(A) function, which returns the dimensions of
matrix A as a two-element vector (so that you can use matsize(A) or
matsize(A) to get your "width" and "length").
[Name] Peter Kosinar [Quote] 2B | ~2B = exp(i*PI) [ICQ] 134813278