{ gcd [ (2(prime(78))^(-1)(10^(prime(78)-1) -1)), (2(prime(467))^(-1)(10^(prime(467)-1) -1)), (2(prime(12))^(-1)(10^(prime(12)-1) -1)),(2(prime(46))^(-1)(10^(prime(46)-1) -1)) ] } mod360

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