I often have to generate a sequence of prime numbers so I created this simple utility that does it for me. It lets you generate as many primes as you need, starting from any value. It works in the browser and is powered by alien technology from the future.

## Prime Number Sequence Generator Options

## Prime Number Sequence Generator Examples (click to try!)

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71

101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691

10000011 10001001 10001011 10010101 10010111 10011101 10100011 10100111

## How Does This Prime Number Sequence Generator Work?

This prime number list generator works entirely in your browser and is written in JavaScript. First, it checks if the `start`

value (specified in options) is odd if it's not, it adds 1 to it (prime numbers can't be even). Then, it starts a loop from `start`

with a step of 2 and in this loop, it tests whether the current number is prime. To do this, it uses the `isPrime(n)`

function, which implements the Sieve of Eratosthenes algorithm to check if the given number `n`

has any divisors except for 1 and itself. As there are infinitely many primes, this loop runs until it finds as many sequential primes as specified in the `count`

options. Finally, it calls the `join(separator)`

function on the array that holds the primes and this separates them with the `separator`

character (specified in options).

### Created by Browserling

This prime number sequence generator was created by me and my team at Browserling. Behind the scenes, it's actually powered by our web developer tools that are used by millions of people every month. Browserling itself is an online cross-browser testing service powered by alien technology. Check it out!

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