Pratt's Primality Certificates

Simon Wimmer 📧 and Lars Noschinski 🌐

July 22, 2013

This is a development version of this entry. It might change over time and is not stable. Please refer to release versions for citations.


In 1975, Pratt introduced a proof system for certifying primes. He showed that a number p is prime iff a primality certificate for p exists. By showing a logarithmic upper bound on the length of the certificates in size of the prime number, he concluded that the decision problem for prime numbers is in NP. This work formalizes soundness and completeness of Pratt's proof system as well as an upper bound for the size of the certificate.


BSD License


Session Pratt_Certificate