Free Software Anywhere to Calculate Determinant of 4x4 Matrix with Elements in [-2^31, 2^31-1]?

I'm unit-testing embedded code that calculates the determinant of 4x4
matrices with elements that are 32-bit signed integers.

The method I'm using in the embedded code is the standard cofactor
expansion, so the result is exact.

Per Hadamard's inequality, I'm using 160-bit signed arithmetic.

Just so I don't make the same mistake in my program that generates the
unit test vectors as I do in my embedded code, is there any free
software out there that will calculate large determinants?

I'll be using the GMP and a C program to generate test vectors, but
I'd like an "independent" program to double-check the program that I'm
using to generate the test vectors.

I've had good luck with "bc" for some large integer arithmetic test
cases, but I don't believe "bc" will do matrix determinants.

Thanks, Dave Ashley
.

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