perplexus.info :: Just Math : Prime divisors

Prime divisors (Posted on 2005-01-04)

6300846559 is such that 6 is divisible by 2; 63, by 3; 630, by 5; 6300, by 7; and, in general, if you take its first N digits, it will be divisible by the N-th prime.

There is only one other such 10 digit number: can you find it?

See The Solution Submitted by e.g.

Rating: 3.7500 (4 votes)

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Some Seven and Eight Digit Analogues

Comment 13 of 13 |

3 seven digit analogues: 2751195, 2758862, 4200955

2 eight digit analogues: 42009551, 66506726

Posted by K Sengupta on 2023-09-20 08:15:36

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