is there rudimentary algorithm establish x prime?


i have perplexing work proceed by digest euler, have beheld handful problems ask establish primary array biased it.




  1. i know i only method x 2, 3, 4, 5, ..., retard bottom x i retard root, i (safely) assume array prime. unfortunately fortitude seems definitely klunky.


  2. i've looked improved algorithms establish array prime, nonetheless confused fast.




is there rudimentary algorithm establish x prime, upset small mortal programmer?



thanks much!



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