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Post Closed as "no longer relevant" by Felipe Voloch, Gerald Edgar, Asaf Karagila, S. Sra, Bill Johnson
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fixed grammar in title
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When started and when ended did the career of 1 as a prime number begin and when did it end? |
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When started and when ended the career of 1 as a prime number?The old Greek did not consider 1 a number, so it was not a prime. The theorem of unique prime factorization excludes 1 to be a prime number. But in between probably at Euler's and Goldbach's times? Who can determine most precisely (probably by original papers) when 1 first became a prime number and when 1 had been called a prime number for the last time?
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