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Curious Consecutive Cyphers II (Posted on 2009-02-23) Difficulty: 2 of 5
A positive integer T is defined as a factorial tail if there exists a positive integer P such that the decimal expansion of P! ends with precisely T consecutive zeroes, and (T+1)th digit from the right in P! is nonzero.

How many positive integers less than 1992 are not factorial tails?

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
re: Complete Analytic Solution -- a nit to pickCharlie2009-02-25 11:19:14
SolutionComplete Analytic SolutionJer2009-02-24 14:23:54
re(3): Computer SolutionDaniel2009-02-23 13:10:46
re(2): Computer SolutionCharlie2009-02-23 12:45:50
re: Computer SolutionCharlie2009-02-23 12:32:51
Solutioncomputer solutionCharlie2009-02-23 12:27:29
Computer SolutionDaniel2009-02-23 11:55:33
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