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Just showing those entries submitted by 'Opao': (Click here to show all) 19 is the smallest twodigit number such that 19^19+191 is prime. [Opao]The sum of 19 consecutive Fibonacci numbers starting from the 19th Fibonacci number is prime. [Opao] The largest value of n less than a thousand, such that 2^{n}+3^{n}+5^{n}+7^{n} is prime. [Opao] 19 is the smallest prime mentioned a prime number of times in the KJV Bible. [Opao]
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