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Old 2018-07-19, 15:12   #4
science_man_88
 
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Jul 2009
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Quote:
Originally Posted by cmd View Post
I ... sm88


pari gp > if ( z == 49 , print ( " 97 is prime " ) )
congruence works in this case for divisors of 72 = (2*49-1)-((49+1)/2)=97-25
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