Prime Finder

लाखों नवीनतम Android ऐप्स, गेम्स, संगीत, फ़िल्में, टीवी, पुस्तकें, पत्रिकाएं आदि का आनंद लें. आपके सभी डिवाइस पर, किसी भी समय, कहीं भी.

Prime Finder lets you find primes of all sizes, and primes that follow formulas and simple digit patterns.

This App has 6 main options:

1) test any number to see if it is prime;

2) find primes with any number of digits;

3) find primes near any number;

4) find primes that follow a digit pattern like

11, 111, 1111, 11111, or 7, 97, 997, 9997 ... etc.;

5) find primes that follow a formula, like

n^2 + 1 for n = 1, 2, ... .

6) make several expressions be prime simultaneously,

like n and n + 2 (twin primes).

These options can handle numbers up to 10,000 digits.

This App also contains data on the first 100 million primes. This App can:

7) find the nth prime (n can be as large as 100 million);

8) count the number of primes up to x (x can be as large as 2,038,074,743).

Features:

1) this App uses the fast BPSW primality test to check whether a number is prime;

if it is not prime and has 30 or fewer digits, this App will factor it into primes;

2) you can copy the output to the device's clipboard;

3) it's free, has no ads, no special permissions are requested;

4) you can cancel a long calculation at any time;

5) built-in Help text has information about primes and prime testing,

along with links to more detailed Wikipedia articles.

If you find a bug, email me and I'll get to work on fixing it.

If you have a suggestion for a new feature, email me and I'll consider adding it.

This App has been tested on a Galaxy Tab, and Galaxy ii, 3, and 4 devices.