Prime Checker

Checks whether a number is prime using trial division, computes its prime factorisation, and finds all prime numbers in a given range using the Sieve of Eratosthenes.

• →Enter a number to test its primality and see its complete prime factorisation.
• →Switch to "Range" mode and enter a start/end to list all primes in that range.
• →Large numbers (9+ digits) use probabilistic tests — the result indicates confidence level.