# Large integer aritmetic in OpenFHE

**URL:** <https://openfhe.discourse.group/t/large-integer-aritmetic-in-openfhe/2299>\
**Category:** Show & Tell\
**Created:** [March 9, 2026, 1:02pm UTC](https://openfhe.discourse.group/t/large-integer-aritmetic-in-openfhe/2299 "2026-03-09T13:02:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![narger](https://yyz1.discourse-cdn.com/flex031/user_avatar/openfhe.discourse.group/narger/32/420_2.png) [@narger](https://openfhe.discourse.group/u/narger)\
**Post date:** [March 9, 2026, 1:02pm UTC](https://openfhe.discourse.group/t/large-integer-aritmetic-in-openfhe/2299/1 "2026-03-09T13:02:43Z")

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hi all! 🙂

I would like to share with you a result i’ve been recently working on, that is dealing with large integers (e.g. 64/128 bits) in discrete-CKKS. I implemented a possible solution using the openfhe implementation of CKKS and you can find the source code on [GitHub](https://github.com/lorenzorovida/flexible-integer-arithmetic-ckks) and also a preprint on [ePrint](https://eprint.iacr.org/2026/450).

i would be happy to receive some feedback in case you are using/playing around with it! 😛 thanks!!