BigNumber Library - anyone using with Photon/Particle devices?

Curious if anyone has experimented with the BigNumber library on the Particle devices? Mainly my concern is with RAM since that seemed to be an issue when I last used this library on ATmega1284.

Library reference:

I noticed that the SSL library for the Particle communication uses a multiple precision arithmetic library (firmware/communication/lib/tropicssl/library/bignum.c). Anyone familiar with this library and how it may compare to the Arduino ported one referenced above?

Anyone doing mathematical operations requiring large numbers too?