Without evaluating the value of N=5*7^34
prove that at least one digit appears in the number four or more times.
Clearly this intends 5 * (7 ** 34), since the alternate precedence would have far more than 30 digits, forcing more than three of one or more digits. I had originally counted 30 digits for the parenthesized expression (54116...) forcing 31 for the whole expression. My error, as previous post correctly shows.
Edited on January 25, 2010, 5:35 pm