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title: Finding Fibonacci numbers for which the first and last nine digits are pandigital.
url: http://projecteuler.net/problem=104
desc: |
The Fibonacci sequence is defined by the recurrence relation:
Fn = Fn1 + Fn2, where F1 = 1 and F2 = 1.
It turns out that F541, which contains 113 digits, is the first Fibonacci number for which the last nine digits are 1-9 pandigital (contain all the digits 1 to 9, but not necessarily in order). And F2749, which contains 575 digits, is the first Fibonacci number for which the first nine digits are 1-9 pandigital.
Given that Fk is the first Fibonacci number for which the first nine digits AND the last nine digits are 1-9 pandigital, find k.
solution: |
Bruteforce
solutions:
solve.php:
desc: Bruteforce - Sooooo slow
language: php