i) Find (just by trial and error) all solutions of 2x2 is congruent to 1 mod 17 and 2x2 is congruent to 1 mod 23 ii) Now find all solutions of 2x2 is congruent to 1 mod 391
[Note: 391 = 17*23]
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Did you mean to write? and
Note that if :
And your solution follows.
This doesn't always work, I forgot how to do this, I need to check. I think it works anyway if both moduli are prime.
Originally Posted by Haven Did you mean to write? and Yeah. That's how it looked when I posted it, but the formatting was lost for some reason.
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