# N2x3x5x7x — a surreal number explorer

> a surreal number explorer (iPhone/iPad app by DaliFermat Ltd.)

- Source: https://appshunter.io/ios/app/n2x3x5x7x/id1396016488 (this page in markdown: same URL + `.md`)
- Developer: [DaliFermat Ltd](https://appshunter.io/developer/1131359876)
- Category: Utilities, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 15 MB
- Languages: American English
- Released: 2018-07-22
- Data updated: 2026-05-18
- User reviews in markdown: https://appshunter.io/ios/app/n2x3x5x7x/id1396016488/reviews.md

## What is N2x3x5x7x?

Is your telephone number prime ? Or your Birthday ??
N2x3x5x7x will show the prime factors for any number up to 10,000,000,000. It will also convert any number from/to any base 2 to 16. 
Use N2x3x5x7x, with its unique spiral keyboard, to explore the natural numbers and see if you can find primes, or perhaps a surreal pattern...

N2x3x5x7x, an infinitesimal contribution to Number Theory


## Version history (last 2 releases)

### 1.3 — 2020-04-15

Updated for latest OS.

### 1.1 — 2018-06-09

No release notes.

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## More apps by DaliFermat Ltd

- [EarthTime](https://appshunter.io/ios/app/earthtime/id1131359877)
- [VeriTab](https://appshunter.io/ios/app/veritab/id1536553217)

All apps by DaliFermat Ltd: https://appshunter.io/developer/1131359876

## Related topics

[n2x3x5x7x](https://appshunter.io/ios/topics/n2x3x5x7x)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-18.*