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Prime Number Calculators 
This page contains calculators that verify prime numbers in various ways. Enter a natural number, n to determine if it's prime or likely prime. Enter k for the number of unique samples of a as it applies to Fermat's Little Theorem. Press the Calculate button to get the answer. Press the Clear button to remove the results. 
WARNING
This program attempts to handle reasonably large values; however, an excessive n value could cause this program to stall or even crash. Close the browser tab to recover.
| Status | Function Name | Is Prime | Time (ms) | Composite | 
|---|---|---|---|---|
| Trial By Division | ||||
| Trial By Division (√n) | ||||
| Fermat's Little Theorem |