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Prime number calculator

World's simplest number tool

Quickly calculate a list of prime numbers in your browser. To get your list, just specify the starting value and the number of primes you need in the options below, and this utility will generate that many prime numbers. Created by developers for developers.
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Starting Prime and Quantity
Prime numbers start from this value.
Generate this many prime numbers.
Prime Number Separator
Place this symbol between prime numbers. (By default a line break.)
Prime number calculator tool What is a prime number calculator?
This is an online browser-based utility for calculating a sequence of prime numbers. All integers (except 0 and 1) have at least two divisors – 1 and the number itself. Numbers that have only these two divisors are called primes. In this tool, you can specify how many primes you need, set the minimum value, and the tool will generate all prime numbers that are greater than or equal to this value. You can also customize the output list of prime numbers by specifying a symbol to place between them. That's numberwang!
Prime number calculator examples Click to use
First 100 Prime Numbers
In this example, we generate the first 100 prime numbers. The sequence of primes begins with the number 2 and continues to number 541 (the 100th value). The prime separator is set to a space.
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199 211 223 227 229 233 239 241 251 257 263 269 271 277 281 283 293 307 311 313 317 331 337 347 349 353 359 367 373 379 383 389 397 401 409 419 421 431 433 439 443 449 457 461 463 467 479 487 491 499 503 509 521 523 541
Required options
These options will be used automatically if you select this example.
Prime numbers start from this value.
Generate this many prime numbers.
Place this symbol between prime numbers. (By default a line break.)
Eight-digit Primes
In this example, we generate six eight-digit primes. We specify the starting value to be 10,000,000 but because it is not a prime, the tool finds the nearest following prime (10000019) and puts it as the first value in the sequence.
10000019 10000079 10000103 10000121 10000139 10000141
Required options
These options will be used automatically if you select this example.
Prime numbers start from this value.
Generate this many prime numbers.
Place this symbol between prime numbers. (By default a line break.)
Pro tips Master online number tools
You can pass options to this tool using their codes as query arguments and it will automatically compute output. To get the code of an option, just hover over its icon. Here's how to type it in your browser's address bar. Click to try!
https://onlinenumbertools.com/calculate-prime-numbers?&start=2&count=100&separator=%20
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