npm install bi#bi#
##Pure JavaScript Big Integer module for node.js##
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Copyright (c) 2012 10iii
All Rights Reserved.
This module is released under a BSD license.
This module is modified from Tom Wu's jsbn library. Which is also under a BSD license.
See
The main change from jsbn is using a buff array instead of hashset member to keep digits, and estimate buff size when create a new BI object during calculating.
For detail see