title: Java library for fast multiplication of very big numbers
body: <p>I am writing a program which requires multiplication of very big numbers (million digit) at a point. Can anyone suggest a java library for a fast multiplication of big numbers? I have found <a href="https://github.com/tbuktu/ntru/blob/master/src/main/java/net/sf/ntru/arith/Sch%C3%B6nhageStrassen.java" rel="nofollow noreferrer">this</a>, but I'm not sure if this is the right solution, so I'm trying to find another to try.</p>