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| Math Central | Quandaries & Queries |
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Question from Sayuri, a student: what is the smallest natural number n, greater than 1, for which (1x2x3x...n)+1 is not a prime? |
Sayuri,
Did you try some values for n? If n = 2 then 1 × 2 + 1 = 3 which is a prime. What about n = 3 and 4 and 5 and 6...?
Penny
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