find number is prime or not in most optimised way (used in T prime)
Fri Aug 20 2021 11:15:26 GMT+0000 (Coordinated Universal Time)
Saved by @faisals
http://codeforces.com/contest/230/submission/112224422Fri Aug 20 2021 11:15:26 GMT+0000 (Coordinated Universal Time)
Saved by @faisals
http://codeforces.com/contest/230/submission/112224422
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