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enzocreti 2019-04-17 18:08

Prime number 30241
 
The prime number 30241 has the property that is congruent to 7 (mod(7!-1)).


where 7!-1 is 5039, a prime


What is known about primes p such that


p is congruent to q (mod(q!-1)) with q and (q!-1) both primes?


See also the curious property that 3!*0!*2!*4!*1!+1=17^2



Is Wilson theorem or Fermat theorem useful?


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