get-primes
Finds any prime numbers up to given limit. Based on linear Sieve of Eratosthenes algo.
quick-primefactors
Quickly get a number's prime factors, using a cached Sieve of Eratosthenes
fast-prime
Fastest Prime Number Calculation logic for nodejs and browser (checks, random generator, prime range generator, primes count generator, summation of primes, factorial of primes)
check-prime
Node module for checking if a number is prime