Is Prime?

simple to use and fast results

Stelios Rantos · com.srantos.isprime

Not rated yet 1K+ downloads v1.5.9 1.4 MB Android 6.0+ PEGI 3 · Everyone

Download APK 1.4 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v1.5.9 (9)
Updated: Jul 1, 2026 (3 months ago)
APK size: 1.4 MB
Requires: Android 6.0+ (API 23)
CPU support: Any (no native code)
Category: Education (app)
Listed since: Jun 12, 2023 (at least)
Permissions: 1
Website: srantos.wordpress.com
Developer contact: [email protected]

About this APK

Is Prime? is an app by Stelios Rantos in the Education category, listed since at least June 2023. It has no native code, so it runs on any Android processor.

Since version 1.5.1, the minimum Android version rose from 4.0 to 6.0. It asks for 1 permission, none of them sensitive. It asks for the same permissions as version 1.5.2.

What's new in v1.5.9

updated for Android 16 code improvements

Description

From the listing uploaded by “appupdater”.

Checks if a number is prime or composite. If the number is composite, it is also decomposed into a unique product of prime numbers. A table with primes is also provided in the options menu. No ads.

Version history

3 versions are listed, going back to v1.5.1. Since v1.5.9 it requires Android 6.0+.

v1.5.9 LATEST Jul 1, 2026 1.4 MB TRUSTED v1.5.2 Jun 16, 2026 1.3 MB TRUSTED v1.5.1 Jul 25, 2024 1.5 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jul 1, 2026.
Certificate issued to “Stelios Rantos” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Jul 1, 2026
Validated against Google Play Jul 1, 2026
Signed byCN=Stelios Rantos, C=GR
Signing certificate (SHA-1)19:61:41:9C:53:1E:B7:44:E4:A7:8A:F1:84:48:76:67:47:D0:89:43
File MD5d8f96d59892f906f9901b7875a522292
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (1)

Is Prime? requests 1 permission, none of them sensitive.

Internal broadcast protection (app-defined) com.srantos.isprime.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait

Is Prime? APK: questions and answers

Is there a version of Is Prime? for older Android phones?

The current version needs Android 6.0 or later. Version 1.5.2 is the newest listed build that installs on Android 4.0 and later. Get version 1.5.2 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Is Prime? APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is d8f96d59892f906f9901b7875a522292.