Most Naive Primality Tester

Use numbers with 18 or fewer digits, do not use commas.

If you enter an 18-digit number that happens to be prime, it may take a minute (or 5!?) to verify its primality by this naive algorithm, since after all as many as 500,000,000 trial divisions will have been performed. So be patient...?

© 1997-98, Paul Garrett ... [ ]
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