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Old 2015-11-26, 11:41   #26
Ale
 

5·7·103 Posts
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number 12:


*3*7*8*9*3*8*9*11*12
%219 = 258961483526405092926701654192947200000000
(12:38) gp > isprime(%-1)
%220 = 1
(12:38) gp >
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