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-   -   Modified Fermat pseudoprime (https://www.mersenneforum.org/showthread.php?t=22408)

devarajkandadai 2017-06-24 12:11

Modified Fermat pseudoprime
 
We can define above as a composite number which behaves like
a prime number with respect to modified Fermat's theorem.

Example: 21; (7 + i)^440==1 (mod 21).

Note (7+i)^20 is not congruent to 1 (mod 21).


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