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Just showing those entries submitted by 'Gupta': (Click here to show all) 6 is the smallest composite number whose sum of prime factors is prime. [Gupta]The only perfect number that can be sandwiched between twin primes. [Gupta] The product of the first four nonzero Fibonacci numbers. Note that 6 + 1 and 6  1 are twin primes. This is the smallest such product of consecutive nonzero Fibonacci numbers. [Gupta]
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