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?

Submitted by e.g.

Rating: 3.7500 (4 votes)

Solution: (Hide)

8757193191

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Some Seven and Eight Digit Analogues	K Sengupta	2023-09-20 08:15:36
another computer solution	Charlie	2021-06-19 08:24:45
answer	K Sengupta	2007-04-17 15:13:50
re: A further analysis	Ady TZIDON	2005-01-05 09:50:03
re(4): Solution (VB program) (Thanks !)	Penny	2005-01-04 20:03:37
re(2): A further analysis (my oopsies)	Jer	2005-01-04 19:11:40
re: A further analysis	Charlie	2005-01-04 18:51:16
re(3): Solution (VB program)	Charlie	2005-01-04 18:29:01
A further analysis	Jer	2005-01-04 18:20:26
re(2): Solution (VB program)	Penny	2005-01-04 17:23:43
Short program	Federico Kereki	2005-01-04 17:19:47
re: Solution (VB program)	Charlie	2005-01-04 16:00:11
Solution (VB program)	Penny	2005-01-04 15:44:05

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