I find that"simple" questions are taking up most of my time and i run out of tim on tests
plz provide a short cut
plz provide a short cut
- Attachments
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4^17-2^28
(2^2)^17-2^28
2^34-2^28
2^28*(26-1)
2^28*(64-1)
2^28*63
2^28*7*3^2
the greatest prime factor = 7
