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Number Theory Calculator
Prime Checker
GCD & LCM
Even or Odd
Factors
Prime Number Checker
Enter Number
Check if Prime
Test These Numbers
2
17
25
97
100
101
GCD & LCM Calculator
First Number
Second Number
Calculate GCD & LCM
Example Pairs
12, 18
15, 25
21, 28
48, 72
7, 13
36, 60
Even or Odd Checker
Enter Number
Check Even or Odd
Test These Numbers
1
8
15
100
99
0
Factors of a Number
Enter Number
Find All Factors
Try These Numbers
12
24
30
36
50
72