Powerful number theory tools for GCF, LCM, divisibility, and prime testing. Perfect for students, teachers, and mathematicians.
Find the greatest common factor of 2-6 numbers
Calculate GCF using Euclidean Algorithm or Prime Factorization methods. Perfect for simplifying fractions, finding common divisors, and solving number theory problems. Supports up to 6 numbers with instant results.
Open GCF Calculator→Calculate the least common multiple instantly
Find LCM of 2-6 numbers using Prime Factorization or GCF Formula. Essential for adding fractions with different denominators, finding common multiples, and scheduling problems. Dynamic input fields and visual explanations.
Open LCM Calculator→Test divisibility rules and check remainders
Check if numbers divide evenly with two modes: Single Divisor for specific tests or Common Divisors to test 2,3,4,5,6,8,9,10,12 at once. Color-coded results show divisibility status, quotients, and remainders instantly.
Open Divisibility Calculator→Verify if numbers are prime or composite
Test primality instantly with Quick Check mode or view all factors in detailed mode. Efficient algorithm works for numbers up to millions. Perfect for learning number theory, cryptography, and mathematical problem-solving.
Open Prime Checker→