I want to factorize very large no
Example:
a = vpi(2);
b = a^2067;
c = b-7;
How to sactorize it?
When i factorize by factor function then matlab display only those factors which are less then 2^32;
and the remaning value as a factor?
What is the Problem?
and How to handle it Please?

Of course it is free. The file exchange provides tools that are free for your use. VPI does not come with MATLAB directly because it was written by a third party. In this case, I am that third party.
Just download it, install it as directed, then use it and enjoy it.

Hi Nicolas,
VPI uses a Pollard rho algorithm for factoring. While it is significantly better than MATLAB's builtin factor tool, which can only handle numbers as large as about 10 digits or so, the scheme I used is often ineffectual on numbers that are the product of two seriously large primes. Of course, that is a difficult problem in general, else many of the encryption schemes in common use today would fail miserably.
One of my goals has been to re-write factor to use a better scheme, but until then I should put in a warning message when factor has failed to resolve a composite number fully into its prime factors.
So you did nothing wrong here, except to give factor a number too large for it to handle.

Hi.
First, great tools!
Second, what am I doing wrong?
>> p1 = vpi('40094690950920881030683735292761468389214899724061')
p1 =
40094690950920881030683735292761468389214899724061
>> p2 = vpi('37975227936943673922808872755445627854565536638199')
p2 = 37975227936943673922808872755445627854565536638199
>> factor(p1*p2)
ans =
1522605027922533360535618378132637429718068114961380688657908494580122963258952897654000350692006139
It should give p1 and p2...
Thanks!

Comment only