Posted by Joe on Tuesday, May 10, 2011 at 4:35pm.
probably since
1*2*3*4*...*1000 ≠ 24001
(just multiplying the last 3 numbers, 1000*999*998 is already 997002000, and we still have to multiply that by 997 other numbers.)
on the other hand, M is prime.
(I tried to figure out how you got 24000, and just realized that you simply multiplied 1*2*3*4*1000.
Did you not know what the .... in between the numbers meant ???)
Oh i did 1 times 2 times 3 times 4=24, then times the 1000 which is equal to 24000, then on the outside of thefraction it says add 1 so thats how i got 24,001. I dont know what the ...means thats how the problem was written. How does that make it prime though if you don't know the actual number?
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