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Four factors (Posted on 2015-11-06) Difficulty: 2 of 5
Let N = 111 ... 1222 ... 2, i.e. 1999 digits of digit 1 followed by 1999 digits of 2.

Express N as a product of four integers, none of them equal to 1.

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
Solutionby induction, not rigorousCharlie2015-11-06 09:56:37
SolutionsolutionPaul2015-11-06 09:48:00
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