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Prime divisors (Posted on 2005-01-04) Difficulty: 3 of 5
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)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
answerK Sengupta2007-04-17 15:13:50
Some Thoughtsre: A further analysisAdy TZIDON2005-01-05 09:50:03
re(4): Solution (VB program) (Thanks !)Penny2005-01-04 20:03:37
re(2): A further analysis (my oopsies)Jer2005-01-04 19:11:40
re: A further analysisCharlie2005-01-04 18:51:16
Solutionre(3): Solution (VB program)Charlie2005-01-04 18:29:01
A further analysisJer2005-01-04 18:20:26
re(2): Solution (VB program)Penny2005-01-04 17:23:43
SolutionShort programFederico Kereki2005-01-04 17:19:47
Solutionre: Solution (VB program)Charlie2005-01-04 16:00:11
SolutionSolution (VB program)Penny2005-01-04 15:44:05
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