Thread: Math Problem
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Old 11-22-2002, 12:32 AM
BruceZ BruceZ is offline
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Join Date: Sep 2002
Posts: 1,636
Default Answer

You asked one like this before. Each time we muliply by 99,193, the one's digit gets multiplied by 3, so it goes (starting from the 1st power) 3,9,7,1,3,9,7,1,3,9,7,1... Since 4131/4 has a remainder of 3, the result ends with 7.

Now, find the largest prime number there is, or prove that they go on forever.
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