PARI/GP review
A broad, programmable math system for arithmetic, algebra and numerical work.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
PARI/GP is a free, open-source computer algebra system built for fast number-theory computation. It combines the PARI C library with gp, an interactive calculator and scripting language, giving mathematicians, researchers, educators and developers a programmable environment for symbolic and numerical work. Its scope includes arithmetic functions, integer factorization, algebraic number theory, elliptic curves, modular forms, L-functions, matrices, polynomials, power series, transcendental functions, numerical integration, numerical summation and plotting.
Breadth is a major reason to consider PARI/GP. The system reaches from everyday arithmetic and factorization to number-field computation, elliptic-curve computation and modular forms. It also supports linear algebra, polynomial and power-series operations, plus numerical workflows. The C library and GP-to-C compilation extend its fit beyond interactive calculations, making it relevant when users need programmable computation or want to connect mathematical routines with development work. Web, Windows, macOS, Linux and Android availability gives it a broad platform footprint, while its open-source model avoids a paid-plan decision.
The trade-off is its orientation. PARI/GP is primarily a programmable calculator and computer algebra system, so it suits users comfortable expressing problems through commands or scripts. It is a weaker choice for learners seeking photo input, handwriting recognition or step-by-step tutoring, and it does not provide AI features. Choose it for serious arithmetic, algebraic number theory, elliptic curves and related numerical computation, especially when source availability and extensibility matter. Choose another math app when the priority is guided homework help, conversational explanations or image-based problem entry.
PARI/GP pros and cons
- Where it wins
- Broad coverage across arithmetic, algebra and numerical computation
- Free and open-source with web, desktop and Android platforms
- GP scripting, a C library and GP-to-C compilation support
- Where it doesn't
- More programming-oriented than a photo-based homework solver
- No AI features for conversational problem solving
- Its strongest focus is advanced number theory rather than general tutoring
PARI/GP fact sheet, pricing and score →
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